307 with vortec heads For a cam I would look at the Comp XE262 or the XE256. GM Performance SB-Chevy Cast Iron Vortec Cylinder Heads (2) (809-12558060) JEGS Champion Series 331 Intake ; JEGS Head Gaskets (2) JEGS Head Bolt Kit ; JEGS Intake Gaskets The GM 809-12691728K1 top end kit will fit a '68 307 block. 212 int/ 218 exh @ . So I stuck a 307 I had sitting on the floor in the car just to be able to run it this season. Buy Remanufactured Chevy 350 5. While 906 and 062 Vortec Heads share some similarities, there are also some notable differences. I've been reading alot about these Engine Quest heads. Cylinder Head Type: Standard . In a nutshell, though, there is not a whole lot of difference between a Vortec and a TBI head. Do not sell short with the smaller valve/runner 305 059 vortec heads. Vortec style intake won't bolt up to 307 headsYou can re-drill the intake but the ports won't like up very good Don't get the 991 heads, they will drop compression as they have 76cc chambers and your heads (should) have 68-70cc. com FREE DELIVERY possible on eligible purchases Yes, they will,should be well worth the effort compared to any stock 283 head, Power Pack or othrwise. 1970 Chevelle 307 vortec head swap The LM4 is a 5. 5-9. The L31 Vortec used two castings 12558062 which you have uses induction hardened exhaust valve seats for unleaded fuel. Should be able to see it on the back/top of the block between the driverside head & trans mounting flange. Car currently has the 194/PG and my goals are to have a streetable 300hp-ish backed by a TH350 that's still gonna be halfway decent on gas mileage I'm currently building a chevy 307, I dont need to hear anymore "Why a 307?" or "Better off with a 350". Made from the highest grade cast iron. 875″ bore X 3. A good recipe for a 307/305 is the L30 heads w/beehive springs,262 cam & a 650 carb on a Vortec Performer RPM intake, 305 heads on a 307 (or any other SB cid engine I presume) increases the compression ratio. will this work? Im guessing stock compression is about 8. mine came off of a 97 tahoe. IMHO AL Clean. These are 062 Vortec heads that I use on my 1990 Third Gen Camaro. Join Date: Oct As you'll see, the Vortec heads combination was worth barely 378 hp, and the top five small-block Chevy heads we tested would easily push the Chevelle into the mid-12s without much difficulty. I look on summit's web site and they hace a set of vortec Vortec heads on a 307 would be real interesting. 030" overbore recently for a 46 Chevy pickup. Price, product page $979. They come in several configurations, some up to . 02's and 1. It is intended as a 1 head fits all stock replacement head. This casting # has been used in many different versions of this aluminum 18′ and 15′ Bowtie race head. com FREE DELIVERY possible on eligible purchases. Will this kit fit non Vortec early small block Chevy If you run Vortec heads you will need a different base manifold for the TPI which is $400. If you are boring it out to . 02 S/R The Vortec heads use a very tall valve guide boss. 520 on a 110 lsa, 750 holley dbl I completed this swap a few months ago with the vortec 520 heads. Customer: chevy small 307 what would late model vortec heads do for this engine good or bad? I'm trying to make a little hot rod 88 s10. The flow is a little small The only other v8 putting out less was the 307 at 135hp(not counting the 265 or 283) A 350 with the right cam vortec heads and the right intake+headers+exhaust ect ect will put out 300+hp or more. 94 heads, Stock Vortec heads would work good with the 1. 030 had 462 double hump heads with 2. 040" to get the chamber CC down from the stock vortec 64ccto 58cc to match the Power Packs'. 7 (non LS) Vortec in this thread. These heads will bump compression quite a bit compared to most 350 heads and they tend to flow pretty well for production heads. 100" longer than stock are required. 170 or 180 port 1. 94/1. 520/. I mention that because because there a lot of misinformation out there as well telling people to torque them to a specific ft. Opens in a new window or tab. 3 L99 they but in the 94-96 B bodies- which i would guess are probably The Vortec heads offer great intake port flow despite the rather small 1. Body, Chassis and Mechanical. For a lighter vehicle, this is a perfect as for how to identify a true vortec engine- they have centerbolt valve covers just like every other 87 and newer small block, but they only have 4 intake bolts on each side of the intake vs 6 on the old school heads. 9:1 compression, and even with the small cam it`ll knock the wind out of it. This videos goes over the big problems of the Chevy Vortec cylinder heads. Looking for a cheap way to get a bit more power in process. There are ways to tip the odds in your favor, though. Adapter can be removed and replaced to suit other carbs Suit non vortec heads $550 negotiable . Vortec heads cut guides and springs good to . I know the old eq heads cast in Australia were a good deal. 050 on 108 LSA. There have been many tech articles written about them over the years, so I won’t get to far into the 305HO Heads on 307 The 1967 - 1972 Chevrolet & GMC Pickups Message Board Register or Log In To vortec heads, yes you need to replace the intake manifold 06-06-2017, 07:13 AM #11: BugzC10. UPGRADING THE LEGENDARY L82 WITH ALUM HEADS & CAM. Vortec heads on a 305 mini mouse teamed with a performer cam, springs, vortec performer intake, QJet, 3. 00" bore except with camshafts with less than . Great cam and the 108 lsa gives it some rumble at idle. Part Number: EDL-61019. 935 Hypereutectic 4cc dome pistons-Block . Watch what head gasket you use, especially on a small bore like the 283, in where the spark plug cooling passages get close to the sealing bead. Stock Vortec heads would work good with the 1. Email Report grey1961 Senior Member Posts: 168 Reg: 02 Buy FGJQEFG Intake Manifold Dual Plane Compatible with Chevy Vortec SBC V8 283 307 350 327: Intake Manifolds - Amazon. bm . The heads provide outstanding low-lift flow numbers (the more air you flow, the more potential power) and Fast Burn performance all in an affordable, cast-iron head. what i did was i got a set of vortec heads. If you are considering switching to Vortec heads this video will help you answer some of the questions you may haveWatch this video before buying a used set For a stock-bore 307 with a mild 262/270 cam, aluminum 170cc heads, electronic ignition, and a strong 600-cfm carburetor, that's nothing to be ashamed of. This is vortec friendly with . 2 which is just right for a iron The standard pattern intake that you may buy for a 307 will not work if you wind up with a set of Vortec style heads on a 350-406 SBC down the road. The cr with 58cc heads is 9. @ . If you want to buy new complete GM heads, get the Vortec heads. i did that because the bottom end was still Here’s a comparison of my 062 Vortec 64cc heads to my 369 crate engine 76cc heads. 050" they make 355 HP/410 TQ with 10:1 compression. $550 Negotiable. 307 chevy is 283 bore x 327 stroke as in 3. A set of GM vortec heads would be great for this motor, but you need the Vortec specific intake for it as well. I include a diagram so you can pause the video and fully understand the pattern. Auto Dynasty. The previous build was pretty good, ran fairly stong (never got to the strip), and had a very I don't imagine it had dished pistons but more then likely 72 or 74 CC Heads. 3 small block engine used in GM trucks between 2003 and 2005. On this type of build with non modded vortec heads and stock vortec retainers and seals I have used the Isky Oval track . Currently I have Edelbrock Performer EPS Intake Manifolds 2701. I use AC 41-993 tapered seat plugs in my 1997, 5. 73s. 1970 Chevelle 307 vortec head swap since the 350 Vortec head have the same ports as the cast iron B body LT1 heads, i'd think the 305 vortec heads "probably" have the same ports as the tiny 200hp 4. Torque to a minimal value then following with a measurement of an angle is pretty much the textbook definition of a TTY fastener. I updated my 1972 307ci small block engine in my 68 Chevelle with new Vortec heads, medium cam,Duration:262/270,RPM range=1300-5600. 450 lift cam. Find Chevrolet Performance Vortec Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Chevrolet Performance cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 hp increase over earlier cast iron small block heads. Double hump heads can do it as well, check the valve size and cc of the chambers. 040 quench, so pump gas should be fine if the 305 and 307 sbc engines are far from the ideal starting points for a performance engine build-up. You'll need a Vortec specific intake. 94 intake valve are very good on a 307. They come with a 1. The best option up until recently was to use 305HO heads, 416s or 601s. If you haven’t bought a cam yet you should seriously consider this one. Should also be visible on the side of the block just below the In this video Robert shows you how he and Joe rebuilt a set of 906 Small Block Chevy Vortec Cylinder Heads!Remember to LIKE and SUBSCRIBE!Follow us on social 10. FULL RESULTS & VIDEO! 2 TESTS! 350 VORTEC HEAD & CAM UPGRADE. Or use a ported 062 or 906 gm vorte head. 5 ratio Flow about 190-195 @ . Gaskets, Complete Head Gasket Set, Premium, pre-1987 Small Chevy, 262, 265, 283, 302, 305, 307, 327, 350, Set. Looking on some advice for a cam I'm gonna put into a 307 with 305 HO 601 Heads in my 65 Coupe. . 035-. Forcett, TAS. Aluminum Bare Cylinder Head Compatible with Chevy Small Block 302/327/350/383/400 SBC 200cc Intake 68cc Chamber, Pack of 2. 02 intake valves. For a lighter vehicle, this is a perfect ok have a basically stock 307. And the 305 vortec heads flow very well compared to the old 416 castings. Improved airflow for small block Chevy 350 Cylinder heads and the Best Chevy 350 heads for sale in Australia. Use a high perf stock diameter spring but you have to take the damper out to fit the vortec heads. They list a performance 305 vortec head , 176 cc runner, 58 c One of the magazines built a 307 with aluminum heads and big cam and all that crap and got 300 HP. 2 which is just right for a iron headed smallblock wanting to run on 87 octane with a cam in the 218 to 220 @. engines. You can go with the factory stamped steel or aftermarket roller as long as they are self-centering. They require the use of a Vortec-style intake and self-aligning rocker arms, and come . Edelbrock may call their heads "Vortec" due to intake port design but they modified the plug requirements to be the same as many other aluminum heads (spark plugs with a gasket). I got a solid 241 cfm on Kev's 2. 02 Fuelie Heads. 475-inch of clearance between the bottom of the retainer and the top of the valve guide seal. SBC, AFR, DRP, Edelbrock Chevy cylinder heads have high performance port & valve seat angles maximize airflow efficiency. 0:1 in 69 and 70. 94 or 2. The 059 heads boast innovative port designs that Now has 355 with Vortec heads, RamJet roller cam, LS6 beehive springs, TH350 Retired, but working part-time on 50s-70s the PROBLEM you face in getting the 305-307 to run is mostly the lack of compareable air flow rates,the result of the smaller valve sizes that will clear the bore and the valve shrouding that the tighter bores If it is a '77 check the cam lobes really well. 307 / L98 heads build advice needed When buying Vortec heads from junkyards (or any head for that matter), the chances increase that the heads will be cracked. Here is a quick comparison chart highlighting the significant specifications of 906 and 906 Vs. 2. My only concern would be finding pistons for it So I ran the numbers and swapping over to 350 vortec heads of the 906/062 design is pretty much a wash on compression when using a steel shim gasket . For what its worth, I bowl blended a pair pretty quickly, left them in carbide, flowed low 230's with the stock valve, put them on an undecked flat top 350 engine. I like the Isky 201278 cam in hot 350 vortec motors. 0L 305 1996-2002 Vortec Cylinder Head – Assembled (Pair) - Part #EQ-CH305BA. Makes quite a bit of power at mid to top end, however withthe cam Also LT4 heads, like late modle LT1 heads, are reverse flow and cannot be run on the older small blocks. I have a set of those swirl port heads on a 307 right now. As was mentioned, if you have to remove much material manifold fit might be an issue. 550 lift Crower cam 234/244 @ . Some of the Vortec heads (like those used in 1-ton trucks) had a lot of iron around the exhaust valve seat and tended to reduce flow. A-Premium Dual Plane Intake Manifold Compatible with Chevy Vortec SBC, V8 283 307 350 327, fits for Chevrolet C/K Suburban Tahoe, Express 96-02 & GMC Savana Compatible with Fit Cadillac Vortec cylinder heads (Chevy SBC Vortec V8 283 307 350 327)--- // Fits for GMC C/K 1996-1999 (C/K full-size trucks), Suburban 1996-1999 307 and vortec heads Engine & Drivetrain. I have a I'm finally getting around to building a 307 that I have had laying around the shop to go into a 46 Chevy pickup rat rod. it gives it a nice little rumble. were used. They Upgrade your 350 engine with Vortec heads by adding a roller cam for increased power and performance. your better off porting the 350 heads and getting some pistons to up the compression, if you have the tipical 76cc head a . Want to get the compression around 10-1. They had 9. 60 valves. Upgrade Chevy 350 cylinder heads the best way to increase airflow, horsepower & torque. 050 range. Keeping factory cam, according to Dyno software the stock cam seems to be best cam for this setup since most aftermarket cams are designed for 350 or larger cubes. You will need to provide additional seal to retainer clearance for over . 84 and 1. 305 are good but 906 are better. 250 stroke, 305 is 3. Replaces Casting Numbers: 12558062, 10239906, Intake Runner 170cc, Combustion Chamber 64cc, Straight Spark Plug. Everything is broke in the shop and I can't keep a motor in the car due to just plain bad luck I guess. Heres the route I'm going- Bored . There are other 305 castings of similar flow etc, not great but an upgrade from the 307 heads I would stay away from the smog casting 1. Check this casting carefully to determine which features it may have. My brother had a 73 nova that originally had a 307. 060 over-400 rods shot peened and polished-KB 3. Ive got a 68 307 in the el camino and for the sake of 66 ElCamino 350 Vortec /TKO 5spd (mousey) Fuel Injection installed 65 Ranchero v8/4-spd, that my uncle bought new. Trick flow has a nice head designed for 305 engines with the small bore that is 1. For a stock-bore 307 with a mild 262/270 cam, aluminum 170cc heads, electronic ignition, and a strong 600-cfm carburetor, that's nothing to be ashamed of. Machine shop warned us about the cam issues as we hunted for another engine. Not great from a flow perspective, but they will be fine for a 307 and will help build good cylinder pressure. Would wind very nicely to 7500. 540" max lift, drop-in valve spring kit for GM L31 Vortec Cylinder Heads This COMP Cams Valve Spring Kit is designed to maximize the potential of GM L31 Vortec cylinder heads when using a hydraulic roller camshaft. i used a compcams 270h hyd. /mag, bronze guides, valve job,and surfacing is $650 in my area and the eq castings are $640 bare for the pair. Crate Engine, GM 350 Small Block Stage 3, 290 HP, Long Block, External/Internal Engine Balance, Vortec Heads, Carburetor, Each Part Number: HPE-HP99C 4. You'll need Vortec specific intake gaskets too. Save Share Test 14: Install GM Vortec iron heads SDPC PN SD8060A (64cc chambers, 170cc intake runner volume, 1. (piston was waaay in the hole), with a performer rpm manifold, a sizey hydraulic camshaft, 248/254 @ . You'll have to use the self-aligning rocker arms used with all 86 up engines. 488/. The 307 should respond nicely using the Vortec head. 99 $ 979. Good 305 head casting numbers. hei ignition. 7. I have read all over that they are good heads, and with a roller cam . 94 valves and D port exhaust . 450 lift. A totally stock 305-307 SBC as you know is rather pathetic in both head flow and cam timing as most were designed as fuel economy combos, and most have restrictive exhaust. EQ 305 H. 02 valve. 21/08/2024. 500 lift. CR should come in around 9. I am running 14 degrees initial and 36 total mechanical advance as that is what it likes in the 307. 5" valves. Registered User . 5. 50 valves, 76 cc Hi Gents, My first post in here I'm looking for some advice re 307 Chev heads. Either way I have to buy valves springs locks etc. 450" valve lift. Runs great but the #1 cylinder plug fouled out after about 1000 miles. Here's my situation, I have to remove the 350 from my car for registration purposes, the authorities here wont allow it to be re-registered with the 350 in it because of power to weight ratio nonsense. 9. Spending money on ***** 58cc Vortec heads and rebuilding a 307 is not a good investment, to anyone! A bone stock 350/260hp engine will out perform your 307 with the vortecs & other mods and get better millage and make your vehicle worth more. Summit self centering roller rockers 1. Chevrolet's dedication to quality and innovation is evident in the design of the Vortec 305 heads. If you don't want to dump a lot into the engine, just get a Summit What rig are you puting it in? There are a LOT of factory GM heads floating around thesedays that would really wake up a 307. The 1947 - Present Chevrolet & GMC Truck Message Board Network > General Truck Forums > Engine & Drivetrain: 307 and vortec heads The heads ca be milled to the ccs you were talking about. Especially if you have the stock heads w/ the 1. 444 “ lift. The 041 head is a 64cc head. cam and stock rocker arms. Chevy SBC 350 217cc 68cc Straight CNC Solid Assembled Cylinder Heads. The guys telling you to swap on some Vortec heads are spot on. Through the exhaust side of the heads, I noted that the exhaust valve stems were wet and coated in oil. Sometimes called "center bolt HO" heads, referring to the valve cover attachment You are going to need some additional things to use the Vortec heads: 1. value. could someone tell me what compression ratio i will have and how much power i 64cc heads and flat-top pistons are about perfect for a little 307. 2 roughly. It’s is very similar to the LM7, except that it’s built on an aluminum block, and the LM7 is an iron-block engine. i was surprised how much that thing pulled. I would expect a 10:1 307 built to LT1 specs with a Holley/RPM Intake,cam and Headers could make 350Hp easy. Anthony. Are the vortec 305 and 350 heads the same. The only bolt ons are performer rpm intake,edelbrock 600 carb, and headers. They are 201268,. Vortec style intake bolt-flange requires Vortec 4-bolt style intake manifold. the better old style (non-vortec) ones you could get IMO would be from a later LG4 motor with larger 1. 1-. [Fitment] Head Bolt Kit Replacement for Chevrolet Chevy SBC 350/ 283/ 302/ 305/ 307/ 327/ 383/ 400, Gen III Vortec, Brodix -8, -10, 11, 11xb, Dart Pro-1; Most Edelbrock, Trick Flow & Most Word Product Metal Heads. A set of Vortec heads wouldn't hurt either. Chevy SBC 350 217cc 68cc Straight CNC Solid Flat Assembled Cylinder Heads Please call for more information. Like I said, the low-budget solution for a 283 buildup made either 416's or 601's a no-brainer (good thing, I'm not so smart sometimes:wacko My option was to use the double humps still sitting on my 327; but even the 64 cc's were to big and the compression The 601 is a truck head it has really small chambers maybe too small because theyre tight around the valves it shrouds them pretty bad. With the readily availability of low cost aftermarket or Vortec heads, using a 305 non Vortec head is even less appealing from a work-to-results/HP standpoint. 5 valves because of bore shrouding. I've read on a few different sites that this combination should work great. However, 062 has slightly larger valves than 906 Vortec Heads. 10 sec. FYI, the vortec 305 and vortec 350 heads are 2 completly different heads. Vortec Bowtie cylinder heads come with bigger valves, a thicker deck surface and 66cc combustion chambers. 58cc will give you about 10-1 compression with the 307 flat piston Engine Quest, Dart and RHS , list a 180 cc head with 49-50 cc chambers , that puts you around 11. 60's. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads FWIW: The 600 CFM or so carb that you buy for a 307 will be too small for a moderate performance 350 that will probably like a 670-770 CFM carb. If you want a good aftermarket vortec h Aead use the RHS 906 torker (vortec) head. You aren't going to get to 10:1 even with . They can actually make some decent power and be great engines. Found a set of #3991492 heads on a local online board which Mortec shows as being 1970 camel humps with 2. Thanks Mike. 540" Max Lift, Hyd Roller - 26918VCS-KIT Complete . With '624' heads and 76cc Chambers, your compression ratio is Another option is a vortec head. I'm currently using, Autolite Platinum AP 104 plugs. 015" and assuming 62 cc's, now if they are 64 cc then looking at . You have a good point there. drivetrain mods are jegs 2500 stall and 4. 0, also remember 78' and up heads i believe are thin castings and will crack at the middle exhaust The only OEM head that will even fit & work with the Vortec EFI intake & EFI system is the L30/305 head. Drivetrain & Performance. It comes on a 108 intake centerline and I’m running it 4 deg advanced in The RH head also has a huge crack below the exhaust ports, but thankfully it barely weeps any coolant at all! I love the results I've read about the vortec heads and am willing to put up with all the changes required to run them. 0 out of 5 stars ( 4 ) There is also 307 and 350 heads that came out in early 70's with harden seats. 8" dia valves. 50 58cc L98 D-port style heads for sale. 14. And since another intake may be in order anyway Vortec heads, a good aftermarket intake with a Qjet and something like a 350 hp 327 cam should make that smallbore do wonderfull things. 510 and 208*/221* @ . 500ish. The 307 is classic powerplant Did a DD2000 on a 60 over 307 with 9. 03 @ 98 mph, 89 octane, daily driven street bruiser. 99. Replaces Casting Numbers: 12552520, 12557113, 12558059, Intake Runner 170cc, Combustion Chamber 58cc – ASSEMBLED. A vortec style intake manifold. Where you can gain substantially more power is by concentrating on the exhaust side of the head. If those heads are Vortec 305 heads they'll be 059/520 heads Chevelle Mechanical. That is why I'm looking into these. See So if you are considering using a set of Vortec heads, keep in mind that these heads will require a new intake manifold along with Vortec-specific intake manifold gaskets. I have a set of Mexican 062 Vortec heads and manifold that came off a HT383 crate motor and the I'm a big fan of the Vortec head but IMO, it's not worth the trouble and expense on a small bore engine. Its gonna run you about 800 per head. 94 valve (should work with the 307 bore) and later The intake face of a Vortec head is cut at a slightly different angle than the First-Generation SBC heads and features an eight-bolt-hole intake manifold hold down as opposed to the standard 12 Got a set of new Vortec heads I am installing on a basic crate 350. NEW Chevy 350 5. 020-inch down from the deck, which is a common They list a performance 305 vortec head , 176 cc runner, 58 cc chamber , 1. 600 lift, will bolt right on an older small block and will out flow the old camel hump heads out of the box, even with smaller 307 crank, shaved . Im pretty sure a stock 307 ran a 72 cc head. A little porting, mild cam. 72/1. 8:1 compression Hoping it will run well. Application: Compatible with Chevy Vortec SBC V8 283 307 350 327. However where I live I can grap pair of vortec heads from 96-99 chevy's 350's for very very cheap around 60$ for them both + 30 days guarantee. 050, 106lsa, and . 736″ I'm assuming we're talking about the L31, 5. 7 Vortec small block. The Vortec cylin The engine it completely stock, plans are 327 crank, 307 pistons, Vortec 062 heads, Edelbrock 2116 intake; and custom exhaust to get best performance and 200-4R trans. 73 gears with 28" tire , gave my C10 a kick in the pants. To find heads from an assembled engine that have a better than average chance of being uncracked, look for: heads from a wrecked vehicle. 14101081 These were supposedly used on 1987 305 engines, 1987-'94 or '95, and TPI 305 engines from 1986 or '87 to 1991 or '92 (depending on the source). Vortec heads have a 64cc chamber. Answered by Anthony in 2 mins 15 years ago. Just use the 58cc Torquer "305" heads with some decent, prudent bowl and port work. , '416 305 heads, 1102 EFI cam and TPI. and a edelbrock 650 carb. Answered by: jshook. I'll be taking care of the exhaust at the same time. 5:1 Magnum roller-tip rockers PN 1417-16, Edelbrock RPM Air Gap Thanks, Scott for starting this thread- The Vortec one really got hijacked and I'm a big part of the blame. We have a great online selection at the lowest prices with Fast & Free shipping on many items! Skip to main content. ALL 307's had the large journals, the 327 crank was taken from the 307. center bolt requires a vortec style intake manifold. 7 heads with larger 1. 3. 0 out of 5 stars. Brand New. The smaller valves will work with the small-bore. 050” on a 108 lsa. a wiend stealth dual plane 600 vacum secondary holley carburater a 2500 stall. Vortec cylinder heads have been around for over 20 years and are still a great option for a performance small block build. ANY Vortecs, 305 ho heads. I just saw a set of these ZZ4 heads on ebay, the aluminum 1. So yes, the cams can be an That "H" head is a really fubared thing. With a stock piston, we’ll assume the piston is 0. With stock springs and retainers, there is only about 0. Vortec Bowtie Cylinder Head Technical Notes: Jeff Smith: “Mash-up” is a good term to use with any discussion of the 305 or 307 engines. Its 218/218@. Late 70 to early 80's were known to have soft cams. You would want them 60-66cc imo. The standard pattern intake that you may buy for a 307 will not work if you wind up with a set of Vortec style heads on a 350-406 SBC down the road. 283, 302, 305, 307, 327, 350, and 400. 7 VORTEC cast # 906/062 Cylinder Heads PAIR Suburban Escalade Isuzu W/Head Gasket Set & Head Bolt Kit (CORE RETURN REQUIRED): Head Gasket Sets - Amazon. Find CHEVROLET Cylinder Heads 170cc Intake Runner Chevrolet Performance Vortec Cylinder Heads 12691728 Cylinder Head, Vortec, Assembled, Cast Iron Performer RPM, Aluminum, Assembled, Hydraulic Flat Tappet, 60cc Chamber, 170cc Intake Runner, Small Bore 265, 283, 305, 307, SBC, Each. . Some 307 Blocks were the 010 or 020 Hi-Nickel Hello Everyone. 305HO Heads on 307 The 1967 - 1972 Chevrolet & GMC Pickups Message Board Register or Log In To vortec heads, yes you need to replace the intake manifold _____ 1969 307, t350 1950 Chevy Wagon 1978 Big 10 1967 C10, 250,3-OTT 06 Some 307 Blocks were the 010 or 020 Hi-Nickel Block. 327 OK. 02 valves They should be a good improvement on a 307. 25" stroke as the 327, but the 307 crank is NOT a 327 crankshaft assembly. Your pushrod length will remain the same, and the rockers need to be self-centering. 94 valves and 64cc chambers. When you swap to the vortec intake make sure you grab new intake bolts. However, it is not compatible with LT1/LT4 or factory roller Small Blocks built from 1985 and newer. Make sure you select the parameter bolt head and not the center bolt head for valve covers. Im wanting to throw a crane 274ho6 cam in. Save Share A set of L30/305 vortec heads would be a better choice. 7 VORTEC L31 Cylinder Heads PAIR # 906 062 Suburban 1996-2002 (CORE RETURN REQUIRED) 5. Re: 307 Chevy with Vortec Heads Post by rebelyell » Mon Mar 09, 2020 10:46 pm 68maliblue wrote: ↑ Mon Mar 09, 2020 10:32 pm I may be wrong but it appears to me that the I built a 307 with 062 Vortec heads and a . GM Certified. I run that cam in a 307 with Vortec Heads 9:1 compression and it runs fine with a stock converter in a th350. for my intake i got a summit stage one duel plane intake. Chevy made Marine 307's putting out 295Hp with the large journal 327 forged crank. Vortec 062's 406 w/hyd. 010 and . Chevrolet 5. Save Share The 307 has the same 3. Are the junkyard Vortec heads the best bang Vortec heads gave me the fever. A flat tappet cam will do you no good in a post-86 roller block. For a 283/307 a great head. 65@125mph 406 with home ported Dart 215 heads. 0:00 Street Accelerations0:27 Intro0:56 Engine Setups2:52 Test Vehicle Setu One issue your going to run into is stock 305 heads have a 58cc chamber. Actually, the 305 is a small-bore, Not to argue on behalf of actually building a 305, but comparing the as cast 327/302 “fuelie” Comp Cams Spring Kit, Gm L31 Vortec Cylinder Head, . This limits valve lift to an absolute i am puting 305 heads on my 307 it has 9. 1,500-6,500 RPM Range. You will find The 307 is the red-headed stepchild of the sbc family. Different chamber volumes, port volumes, port locations, valve sizes, etc. The casting number is 3970020 which identify it as a 115-200 horsepower 1969-73 307not exactly a barn burner! The heads were equally bad 3998991 castings with 1. If the rain ever quits I'll post if the little motor will rev up or not. 10 gears. You will want to stay with a 1. I still cant decide on a cam I was thinking about a Vortec-headed 307 project a while back, but nobody makes full-height pistons for a 307 any more, only "rebuilder" pistons that are . (last 3 digits) Also check the block casting#. 1 flat top pistons 227 duration 475 lift cam. O Heads (416 casting) Small block Chevy Head Bolt torque sequence is really very simple. 94/1 I have some vortec heads I bought for the 350 and am thinking about putting them on the 305 since that's something I can do with what I already have. The main reason the Vortec remains a very popular conversion for mild street small blocks is because this head offers the best intake and exhaust port flow of any production small block head. That would I have a rebuilt 307 short motor and would like some opinions on cylinder head choice, I have the original heads from the 307, casting # 3917293, 1. that doesn,t mean the engines hopeless ,if you think back, there were some rather impressive (at the time) corvette engines in 283 displacement in the past, Im only pointing out that you need Just read this The combustion chamber size is supposed to be 58cc but may well actually be 64. They've got me intrigued, looks like an excellent head for an 283/307/305 swap. I have had some tell me that the heads are the same and some say they are different. Made from LM7 Cylinder Head Specs; Casting Numbers: 862, 706: Material: Aluminum: Combustion Chamber Volume: 61cc: Intake Port Shape: Cathedral: Intake Runner Volume: 200cc: Exhaust Port Shape: Oval: Exhaust Runner Back in the day, around 1980, I scrapped my 68 307 2v heads, went to some 461 heads with 62cc chambers and ran a Isky 201270 . Dump the 305 heads and see if you can get your hands on a set of vortec heads. 2 drop in compression. The L-98 heads used in the 87-91 Corvette and the ZZ-4 Crate motor have 58cc chambers, The vortec 5. 84 intake valve. 474/. 5 valves as 601 casting but larger chamber, actually same chamber they used on all early 305 heads. 84/1. 0 to 1 comp. The ports are taller on the Vortec heads and the bolt pattern between the intake and the head is different. 7-1 compression or so. 875 Bore you can bolt on 62 or 64cc - 1. 445" 216/216* dur@. 3L, Gen. 020" too short, and mine desperately needed a rebore. I have headers, Holley 600 cfm, and an Edlelbrock Performer. 94 intake valves/ steel shim Fel-Pro gaskets Comp Cams Dual Energy cam 265DEH-10 442/465 lift 265/ 269 duration Edelbrock Performer intake Double roller timing chain Edelbrock 600cfm carb. 013"-. 039 The 906 and 062 Vortec heads are two popular cylinder head options used in small-block Chevy engines. The Vortec heads are much like other stock small-block heads in that the intake port flows fairly well, but higher rpm power is limited by a weak exhaust port. 020 further in the hole giving you The Vortec 305 heads work really good to bump up compression, and Crane Cams 10017 works pretty good in a 307. 94-inch valves. 030 overbore will get you to 10. Fun project! Just remember that smaller CID motors are hyper-sensitive to over caming and over carbing. Combustion chamber volume: 64cc You may have been curious to know about Vortec heads Vs TBI heads and the difference between the two. They just got a bad rep because of the wheezy heads GM put on them because they intended for them to be "economy" engines for base model cars. 025 rough estimate, you`ll have about 7. Not all head bolts on a vortec head get torqued to the same value either. It is not a vortec design head. 0 out of 5 stars 305 heads are to small for 350 but are fine for 307, 305, 283. lbs. They have surprised alot of people how well they do on the dyno. Why not build a 350 with the vortec heads and tuned port? I would build a 307 for a pickup or S10 if I was going for gas mileage. 445/. Date published: 2025-01-20. 050, . They not only out flow but also out burn the older heads. 72 intake and 1. 02"/1 GELUOXI PC2033 52033 Vortec Single Plane High Rise Intake Manifold Replacement for Chevy This is a set of Vortec heads we’ve modified by machining the guides, and adding bigger Think Ls came initially with 15° valve angle. It wiped a cam at less than 100k miles. For marketing purposes, the LM4—like the LM7—was also known as Vortec Heads. The heads have just been completely remanufactured, so they're done except for polishing. Cheap intakes are avaliable. They are a dime a dozen and would work great on a 307. With a 3. 100 dome 1970 Lt-1 piston is worth 9. It's set in stone, the 307 is what I got. 7:1 with stock 307 heads which are I put a comp cams cs260ah-8 in a 307 with vortec heads. Might even make a Like said before there are a lot of 305 heads out there . 201278 201288. I've got a spare set of 520 vortec heads from a 97 305 that have been redone. Buy DNA Motoring CYLH-SBC-350 Aluminum Bare Cylinder Head Compatible with SBC 302/327/350/383/400: 307, 327, 350 and 400 (2. The fuelie,double hump, camel hump heads came on 327s. Heck, even using the stock 307 heads with a slightly thinner head gasket would bump the compression to about 9. NO WARRANTY, NO RETURNS ON GARAGE SALE ITEMS 327, 350, 377, 383, 395, 400, 421, 434, Aluminum We strongly recommend using 7/16" One of the magazines built a 307 with aluminum heads and big cam and all that crap and got 300 HP. Proper he Chevrolet Performance cast iron Vortec cylinder heads will fit 1958 and later small block Chevy engines, and offer a 20 to 40 hp increase over earlier cast iron small block heads. 416 is the so called HO head has the same 1. Bottom line for ME is, unless the 305 (or SP) head is the ONLY head available, I wouldn't advise someone new to the porting game attempt to make them work on anything but a 305. they will need to be milled . Chevelle Mechanical. But the word soon spread by way of the performance magazines, especially with one story that pitted the venerated Bow Tie performance head against the Vortec with the Vortec coming out the vortec heads are almost IDEAL for a performance head application on a 283 engine '78 Nova: 307/th350/3. This is Garage Sale priced because it is a vortec head that we typically do not carry. I ran it with a The stock iron 307 heads use a 70cc chamber while the Chevy Vortec heads are 64cc and the Summit Vortecs are 67cc. flat tappet cam. The L-98 heads used in the 87-91 Corvette and the ZZ-4 Crate motor have 58cc chambers, 1. Was looking into putting a set on a flat top piston 307 . O Heads (416 casting) Stock Flow, Mild porting and larger valves VS Stock 305 Vortec head (520 casting)***I lost all my video footage for these heads, 305 H. Add to cart-Remove. Should be #880. 350 Chevy 96 Up Vortex Cylinder Heads 906 & 062 Casting – Pair - Part #EQ-CH350C. I replaced it but now it seems like the About this item [Part Number] 134-3601, 1343601. 7 compression, a . Engine. It is not even aimed at high performance. as for heads if your engine is close to zero deck with 4 valve relief flattops, Trick Flow has a 56cc chamber head, 175cc intake runners 1. Part Number: TFS-31400905 Get the best deals for 305 Vortec Heads at eBay. These heads are crafted with precision to ensure optimal airflow and combustion. 4,526 satisfied customers. 1967 Nova---LS3/4L70e 1970 c10—LSx/4L60e. The Vortec head was first produced for light-duty trucks in 1996, and at first no one really gave these new castings much more than a cursory look. Small-block Chevy heads may not be used on engines with less than a 4. 040" the only available pistons are the 'rebuilder' pistons that sink the pistons . com. but they are far from being a total lost cause, EITHER! EXAMPLE pay attention to the bore stroke ratios, a 307 with its greater bore and shorter stroke , and slightly ;larger displacement my buddies 307 that was . 50 valves) with COMP Cams 1. It made 306 HP at 5,000 and 355 LbFt at 4000 with a fairly flat TQ curve. 025 milled off-. Seemed to do fine. 040 quench, so pump gas should be fine if everything else is right. However, I've also seen that World products make dedicated heads for the small bore SBC such as the 305 and 307. 010. Heres what I used on my wifes 307: Flat top pistons 64cc Vortec heads w/ 1. 041, then add in the deck height which will be around . 307 was the original "stroker small block" and the best-kept secret for cheap fun! A long time ago I had a 100K mile 307, threw on a set of power pack heads, an L79 cam, iron 4 bbl intake, tweaked q-jet and headers. The true versions of these heads (cast # 292, 461,462) had 64 cc chambers and either had 1. 030-. With stock dished pistons and a stock replacement fel pro or the like head gasket of . Features include fast burn combustion chambers, and a high-velocity port design. Please check the part# and vehicle compatibility of your original item before ordering. Hi ! Hi! Sign New Made in USA Cylinder Head Bolt Set Fits sb Chevy 400 350 327 307 305 283. FREE delivery Mar 12 - 13 . the intake bolts are perfectly vertical, have 1/2" heads, and are only on the ends of the intake on either side of the coolant To use stock stamped steel rockers on small-block Chevy heads, +. 510 lift 9. GM Vortec cylinder heads add horsepower to your small block Chevy — Learn what upgrades are required to step up to Vortec-style heads Newest [ December 12, 2024 ] The Key to Making Your Car Fast: The Torque Converter Technical Info 307 i had a 307 in my 70 nova also. The only precription is cow bell. Somewhere on the net there's a picture comparing the two conbustion chambers. IMO a comp 270M is way too much for a mostly stock 307. Casting # should be 059. 50 exhaust valves sitting in 76cc chambers. 450" Lift hyd cams to great success.
atdd umcveqa lzadsh gjcmyoym rotxr vovv trrlfhdt suyhgx gyj chkauj eicogvg gnpz zibzx cpkzsl phk