Pontiac 455 heads. So machine work is required to move it out to a 2.

Pontiac 455 heads Opens in a new window or tab. Pontiac V8 Cylinder Heads. Find PONTIAC 7. 500 ft lbs at 2800 from factory. Talk to the experts. Can be used with 350 engine if 1. 5L/455 Pontiac V8 Edelbrock Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! Performer Pontiac heads are designed for 1962-79 389, 400, 421, 428 and 455 cid V8 Pontiac engines with a 4. Remanufactured. 50's in a 2,400 lbs. 070" smaller then the OD of the valve used. Designed for 1965-79 389-455 c. After years of extensive R&D both on the flow bench and on our track, we have developed some of the best performing round port and D-port Feb 15, 2004 · Yup, that's the number of the heads - 143. They do have all the exhaust manifold holes, unlike some Pontiac heads. 67 out of 5 stars Find many great new & used options and get the best deals for 1970 Pontiac GTO 455 HO Number 64 Cylinder Heads at the best online prices at eBay! Free shipping for many products! Aug 31, 2004 · Does someone know if a # 6x head that has a square center exhaust ports would be good for a Pontiac 455 cu. Part Number: ARP-190-3605 4. 77 valves, and screw-in studs. 210 in bore and stroke, the engine is just barely undersquare, helping it produce gobs of low-end torque. 2165Part Type:Cylinder Heads Cylinder Head Style:AssembledCylinder Head Material:AluminumCylinder Head Finish:NaturalCombustion Chamber Volume (cc):72 ccCNC-Machined Combustion Chamber:YesIntake Runner Volume (cc):215 ccExhaust Runner Volume (cc):175 ccCNC-Machined Intake Runner:NoCNC-Machined Exhaust Runner:NoIntake Port Shape:Ram Air IVIntake Port ARP Pontiac 400-455 w/EDE D-Port Head Bolt Kit 190-3609. Just got rid of my 7M5's on my 455 and replaced w/6X. 11. No hurty low speed performance at all. Might try to dig up some 6X heads from a 77-79 400. d. 77 Sep 23, 2006 · Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. Jan 31, 2015 · Well, I do like 6X's, but my favorite head for a street 455 is the 1971 96 D-port head. 061). These Edelbrock #61599 Performer D-Port CNC Cylinder Heads for 1962-79 389-455 c. 030 over), #96 Heads, Hedman headers, Wolverine 234/244 cam, Performer intake, Holley Sniper "Need a car to run blocker. Aug 6, 2019 · The round port 455 HO heads have a 172 CC Intake port as compared to the at best 155 CC port in the the 6X casting. They flow a little better & will get you about 9:1 or maybe a bit more. Will pay reasonable market price, up to $2500 depending on condition. The above figures assume 10 cc for . _____ Sep 23, 2006 · Stock Pontiac Head Specs * During my searching for information, I found quite a few discrepancies in the sources I was viewing. They really don't need a lot of help otherwise. 87 for deck height volume) *blocks are assumed to have a . O. You won't need the hardened exhaust seats on the 455 heads and depending on the amount of miles he puts on the car he won't need them in the 143's either. 120" bore and flat top pistons (no dome). The Pontiac Performer D-Port head is made from A356 aluminum alloy, and will fit all 1962-’79 Pontiac V-8 blocks with a 4. 5:1 cp. If you prefer a cylinder head that is ready to bolt on your The. Most heads will be fine, but just in case CYA. 0122, 7am-10pm CST, everyday. After 1967 the heads were open chamber heads. The heads were worked for a stock engine and the chambers were checked by the machine shop that worked them and has 92 CC's. 1:1; 9. 94CC Back in 2004 I had my 455 with 6X heads on the dyno with a Crower 60919 cam. bracket car. round port heads. Nov 11, 2013 · They are excellent heads for the 455 with a few upgrades. Pair #4X (4H) Heads $455. 1510 in x 4. 040 now, bore to . Time factors/budget limit this project but it is only for summer work transportation(7-8 miles each way). This means the motor will hold onto its peak HP numbers higher into the rev range in and of itself. Valves: Ferrea 2. The RA I heads were "37". Full resto not in the budget for a while !Just wanna cruise it . We have a great online selection at the lowest prices with Fast & Free shipping on many items! We have a massive inventory of production Pontiac heads to suit all your restoration and drag racing needs. Just need screw in studs if using for high perf. 4hp with a set of well prepared 6X-4 heads that flowed 232cfm. 0 out of 5 stars Apr 10, 2023 · Those are big car Pontiac heads off 455/360hp. Jan 21, 2023 · Good heads for a 455. Part Number: EDL-60595 5. 0 out of 5 stars ARP Cylinder Head Bolt Set 190-3607; Perf Hex Head Chromoly for Pontiac 350-455 (For: 1964 Pontiac) Opens in a new window or tab PerformanceParts - Right Parts, Right Price, Right Away Dec 13, 2005 · 455 7m5 heads Pontiac - Street. compared to a #96. Shop Now at the Guaranteed Lowest Price! $5 off $49 / $15 off $249 / $30 off $499 / $65 off $999* - Use Promo Code: 2025 Jan 2, 2003 · GM once sold three different 455 engines--a Buick, an Olds, and a Pontiac. 1 compression on a 455. We were armed with a 400-cfm laminar flow element (powered by six 1. I'd say they are worth at least $500, if not more, as rebuildable cores--especially to someone who is doing a '70 GTO resto build. in. Nov 30, 2019 · The part that puzzles me is the 46 head had a 1. 030-inch Dec 9, 2024 · This is our first aluminum Pontiac head casting that we have brought to the marketplace. In light of this, the 'Year' entry, as indicated by the chart below, may actually represent the year that the heads were cast, versus the year that they were actually installed on an automobile. 06-inch or larger bore diameter. 2165 parts at JEGS. Call 800. They also include hardened seats, bronze valve guides, and fully machined valve cover rails for a more consistent gasket seal Pontiac 455 Cylinder Heads 1972 72 455 HO GTO Trans Am Formula Rebuilt 7F6. About a 9. If you prefer to supply different valve springs, valves, retainers, and rocker arm studs, bare cylinder heads are an ideal option. The 96's already have the 1. 1971 Pontiac 455 YC Code Block sold. Sell the 6X-4 heads or save them for the 455 you really want to build later on. 600-inch lift. I've been reading on here a lot. About Contact Parts For Sale 455 2bbl/4bbl : 15: 1. 12 Bolt 3. See: HPP 4X Head Jul 6, 2022 · Listed is a true 1975 Pontiac 455 - (462) cubic inch engine with 2 Bolt mains with Arp Main Studs, Arp Head and Connecting Rod bolts, Ready to Ship. Dec 2, 2003 · Compression ratio was 8. The heads will bolt to ALL traditional Pontiac blocks and do not require you to run any off-set lifters Aug 13, 2023 · The Pontiac 455 was a big-block 455 cubic inch (7. 040” quench (reused the . 96/1. This Pump Gas Engine (89 Octane) with its tremendous HP and Torque is the perfect fit for those looking to improve the performance of there classic Pontiac. This head is available with initial flow numbers around 260 cfm! This heads comes as cast with a 65cc chamber, 74 and 85cc CNC'd chambers are available. 050" to . Jan 9, 2021 · My first 455 had 6X-4 heads on it, right at 10 to 1 compression and Crower RAIV clone cam. We have ported D-Port heads that run low tens in 3,700 lbs. KRE Aluminum Pontiac D-Port Cylinder Head. #400 bored . D. 060" cut and FT pistons and a 0. May 23, 2015 · We always open up the 6X heads for the larger exhaust valves, and grind out the huge hunk of material in the top of the exhaust port. 66 exhaust valves are used and the block is clearanced (chamfers in the top of cylinders). Sep 30, 2009 · The only Aluminum Pontiac D-port Head We are pleased to introduce to you, our aluminum D-port Pontiac head. 010" if they clean up there) to a max of . 60 exhaust valves. 030 over forged flat tops, stock or aftermarket rods and perhaps a cam like the Comp 284 XE or something milder. Welcome Guest My Account Order Status Wishlist (866)762-7527. Yep,stock heads with quadrajet!Simple cubes,just need to drive it soon. Wrongway, check both heads for numbers on the center exhaust ports, I suspect there is "1" and a "6" if you look closely. Available! KRE Aluminum Pontiac High Port Cylinder Head Available! KRE Aluminum Pontiac Warp 6 Cylinder Head Available! The start of the War Chief series cylinder heads! Highest Horsepower NA heads per CID in the world! (updated 6/12/13) KRE Aluminum Pontiac Super Wedge Cylinder Head Jan 22, 2020 · Another thing to know about all Pontiac iron head is that the factory sets up the Intake valve seat OD some . the most versatile street engine Pontiac ever produced. All Pontiac V8 cylinder heads from 1955 to 1976 are essentially interchangeable. Pontiac engines feature 2. With 232cfm 6X heads I was also nicely rewarded with 1hp/CID. Pontiac continued using its round-port cylinder-head design for 1971-'72 on the 455 HO. We also service and modify aluminum aftermarket heads, like Edelbrock heads, if you desire. Since Pontiac offered the 400 2-barrel, the 400 4-barrel with both manual and automatic transmissions, and the 455 4 Edelbrock Cylinder Head Assy 60599; Performer RPM 215cc 72cc for Pontiac 389-455 (For: Pontiac) Opens in a new window or tab PerformanceParts - Right Parts, Right Price, Right Away Ultimate Pontiac Head Flows I think the main purpose would be the air flow comparison between the different heads. 66 (included) Jan 30, 2011 · I've purchased a standard bore 455 (Sep 73) and acquired a set of '71 #96 heads, a '69 cast iron intake and the original Quad from the 455 (7043262). 200 Mls Head Gasket . I've read some good things about the Tomahawk TC-01-HF and the Crower 60919 here on the board. Nov 24, 2008 · 72 B body 455 2 barrel 200hp 8. Over the years Pontiac v8 Cylinder heads came in many specifications. 979. 015 inch in the hole, the 96cc combustion Butler Performance is the main source for stock and performance cylinder heads for your Pontiac. May 14, 2017 · 1978 Black & Gold T/A [complete 70 Ram Air III (carb to pan) PQ and 12 bolt], fully loaded, deluxe, WS6, T-Top car - 1972 Formula 455HO Ram Air numbers matching Julep Green - 1971 T/A 455, 320 CFM Eheads, RP cam, Doug's headers, Fuel injection, TKX 5 Spd. They are set up for use with a hydraulic flat tappet cam and have the new 72cc CNC machined Aug 28, 2018 · The engine still pinged. engine’s success were the “7F6” cylinder heads that provided airflow in and out of the engine. Edelbrock 61599 72cc CNC D-Port Aluminum Heads. Two styles are available: a street legal 87cc combustion chamber version for low compression applications using 92 actane fuel and a 72cc chamber version for higher compression, racing applications. 11 intake valves and 1. 060. 66" on the 6X heads. He claims that they would work on my motor even after much doubt from me. FREE RETURNS. A 455 with #13 heads is a MOPAR (Mostly Old People And *****) NIGHTMARE. 041" quench will give him right at 9. 5 liters. I then started adding one gallon of 116 octane racing fuel into a 20 gallon tank of premium gas and that did the trick. Jan 3, 2014 · They are as good as any D-port head really, just they have a big tendency to be cracked. 040 head gaskets (compressed), and "the usual" Pontiac factory deck height of 0. Apr 3, 2016 · 7K3 are 1972 400-4bbl heads, used on all 4-bbl applications that year. So it is unlikely to be a RA I head. Sep 24, 2018 · Edelbrock manufactures a Performer D-port replacement head that will suffice for stock 389- through 455-cu. Head: Part II . 0 out of 5 stars SpecsBrand:SpeedmasterPart Number:PCE281. 030 over bore and heads cut . 060" ~455 bored . 1973 400 High Performance 98. 77, so why pay for the machining if you don't have to. The engine cranked out 455. However, compression ratios were cut dramatically, marking the beginning of the end of the muscle car era. engines or performance Pontiac rotating assemblies with moderate engine upgrades. . 030 Pontiac 455. 7F6 cylinder heads with oversized intake ports and round-shaped exhaust ports were completely rebuilt using bronze valveguides, stainless-steel Ferrea valves in 2. 5 hp vacuum cleaner motors), two graduated vertical manometers to measure atmospheric pressure, an incline manometer to measure actual airflow, and a velocity probe. INTAKE MANIFOLD BOLT PATTERN IS THE SAME FOR ALL 65-79 HEADS. 5:1 is the max I, or anyone who knows what they're talking about regarding Pontiac engines w/iron heads would recommend he use, anyway. partstrader69 (826) 94. Now looking for a good early 455 block and crank. 77" exhaust valve as opposed to the 1. Jul 16, 2010 · All "PointedTack" heads from 1965-up with interchange on any of the 350 to 455 engines. I've talked to area Pontiac people. 060" or larger bore. i. 62 to 1 compression with the . 300" lift. Jan 16, 2024 · Just bought a set of stock rebuilt '96' heads for a mild performance 455 build I am planning. 060" or more, but that's just my preference, not saying it won't work. 4:1. 11 & 1. Would also make a good 400 pump gas head. Pontiac engines, these heads are patterned after the 1969 -70 Ram Air IV Pontiac cylinder head. Heads not stock, but as per JimHands book250 cfm @600 lift. . Find many great new & used options and get the best deals for Pontiac Super Duty 455 Original Cylinder Heads at the best online prices at eBay! Free shipping for many products! Apr 25, 2013 · Horsepower = flow at 28 inches/H2O x 0. Displacements from 350 - 455 cid. 16) were similar to past round-port castings Jan 15, 2015 · The '73 -'74 455 SD heads and the '71 -'72 455 HO heads also used 'bottleneck' studs and non-adjustable valvetrains. So machine work is required to move it out to a 2. The only other Pontiac heads to have straight rocker studs and adjustable valvetrains were the '60 -'63 389 & 421 SD D-port heads and '69 RAV 400 & 303 tunnel-port heads, all of them used solid-lifter cams. I ran those for years and performed well in heavy street car. #15's are one of my favorites for 455 builds if/when we are going to use iron heads, followed closely by the 1974 #46 heads from the 350 engines. engines but with revised intake and exhaust ports for even greater flow. stock suspension street GTO's to heads that run 8. The #15 heads you are considering have smaller valves and they have the same size combustion chambers as the #16 head you already have. Those old Pontiac heads are Dec 31, 2011 · I just put together a sample engine using some gross assumptions (4x heads at 98 cc's, stock valves, Comp Cams XE262H, factory iron intake, 750 cfm Qjet, "good" exhaust manifolds) using a +. howdy yall we have up for sale two pair of 1971 pontiac 455 ho round port heads ………. They have 96 CC chambers, 2. 8:1, assuming flat top pistons (that actually have about 6 cc's of valve relief in them), a standard bore/stroke 455, 0. Made of heavy wall, American Made stainless steel pipe, these modular log manifolds can handle the heat and vibrations that come from a turbocharged engine build. In my 20 years of engine machining I have seen several cracked Pontiac heads. 77 valves, screw in studs. 4hp and 540tq. Products. 11/1. 45 liter) V8 that had a cast iron block and heads. It was part of Pontiac’s second-generation V8 engine family, known for their exceptional power and durability. 1973 Pontiac 455, two-bolt mains (YC-code), 0. e. Ultimate. 010" of the valve OD with pick up a nice chunk of air flow up to . 00. With untouched heads and the Crower 60919 cam we made 440hp/530tq. Heads with casting dates starting around mid-March 1973 to mid-April 1973usually will have screw-in studs. No way will I mill Pontiac heads . My 455 is mounted to a built Turbo 400 and then onto a 12 Bolt with a Moroso Brute Strength Posi with 4:10 gears. Plan to run a stock or aluminum intake, Quadrajet, stock crank, . They are good torque heads and should be 87cc. 455 : 2H : 46 Apr 20, 2018 · Heads. To correct for pop-up pistons, subtract dome volume from chamber volume. 73, 4 wheel disc. This head was installed on all the 400s and 428s except the RAI and RAII engines. 1800Part Type:Cylinder HeadsCylinder Head Style:BareCylinder Head Material:AluminumCylinder Head Finish:NaturalCombustion Chamber Volume (cc):72 ccCNC-Machined Combustion Chamber:NoIntake Runner Volume (cc):215ccExhaust Runner Volume (cc):175ccCNC-Machined Intake Runner:NoCNC-Machined Exhaust Runner:NoIntake Port Shape:Ram Air IVIntake Port Location Oct 9, 2003 · The 4X head was the 49-state casting used on all '73-74 400 and 455ci engines. SpecsBrand:SpeedmasterPart Number:PCE281. and S. They are as follows; one cracked 670 head, 1 cracked 5C head, and EVERY 4X head I have seen[about 6] have been cracked in the center exhaust port. 100% AUTHENTIC! Brand New. 08. 67 out of 5 stars 2 days ago · The best Pontiac heads (for example, Pontiac 350 aluminum heads) offered by Edelbrock in the Performer series depend on the vehicle size and application. Cometic Gaskets C5769-060, 4. There are so many other Pontiac cylinder heads out that that are already 2. In our last issue, we began our foray into the world of airflow, as. This means that a valve job done with the right angles to bring the OD of the Intake seat out to within . 7cc for head gasket, 2cc ring area, and 7. Pontiac Cylinder Head ID Numbers. Ram Air V Heads can be used on your 1965 – 1979 Pontiac motor with displacements from 350 – 455 cid CNC’d combustion chambers available on 74 cc and 85 cc chambered heads CNC ported options of 290, 310, 325 and 340 cfm 4 days ago · Cylinder Head, Performer RPM, Aluminum, Assembled, 72cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each. *Pontiac 455 compression area = 25. Part Number: EDL-60599 4. Dec 2, 2015 · Yes, these are very good heads--aprox 87cc, 2. May 3, 2009 · 455 with '71 #96 Heads Pontiac - Street. If more compression is necessary, the 6X's from a 350 have a smaller chamber. The 1972 455 H. Description: Pontiac 1967-79 400-455 87cc Edelbrock Round Port Heads, Ported to 340+CFM, Complete w/ Ferrea Stainless Steel Valves, Performance Valve Springs (Matched to Application), Chromoly Locks, Retainers, Shop Edelbrock Pontiac 455 Cylinder Heads and get Free Shipping on orders over $149 at Speedway Motors. (1970 455 GTO & 455 GP) Date cast: I099 Get the Best Performance with Speedmaster Cast Aluminum Cylinder Head Big Block Pontiac 389, 400, 455 Ram Air IV PCE281. Feb 12, 2004 · 670 heads on 455? Pontiac - Race. Jan 19, 2020 · This head has the more desirable 2. The HO heads have 108 cc chambers and calculates out to 8. On my '72 Leman's 455, I run a 7K3 set of heads (off a 400). Cleaned, magnafluxed & ready to ship. Jan 1, 1999 · Taylor claims he can duplicate this engine's healthy performance with any D-port Pontiac head with 87cc-or-larger combustion chambers. Get the best deals for Pontiac 455 Cylinder Heads at eBay. 11" intake and 1. Cylinder Head Bolts, High Performance, Hex Head, Pontiac, 400, 428, 455, with Edelbrock Heads, Kit. 060" *Actual displacement of 350. Heads can be used on your 1965 - 1979 Pontiac motor. We also specialize in porting RAII, RAIV, H. Don't have to be perfect or even complete, previous mild porting is OK. With a 4. 6x heads weren't fitted to 455's but certainly were fitted to 350 and 400 engines in the Firebird range at any rate. 010. 66 or 2. 2 comp, correct on a 455 YH. $101. 77 exhaust valves. $4,250. Listed as a 96cc head, the ones I have come across start life about 103cc's and are still about 101cc's after a light cleanup mill. Another bad deal about the 7M5's, those heads are only drilled/tapped for 4 (four) exhaust manifold bolts making headers pretty much un-do-able. ARP Head Bolt Set 190-3605; Hex Head Chromoly for Pontiac 400-455 Edelbrock Head (For: Pontiac) Opens in a new window or tab PerformanceParts - Right Parts, Right Price, Right Away Jan 14, 2015 · The 6x heads are what I used on my 455, find out if they are -4 or -8 either will work but you should get new stainless steel valves they are inexpensive the 6x 4 have a smaller combustion chamber and will yield around 9. Buy KRE Aluminum D Port Head. Jun 23, 2013 · The standard 73 455's made around 250 hp and 330ft lbs of torque if I recall correctly when equipped with 4x heads. It was cheep fun back in the day. They also have pressed in studs and are around 72-75 cc. In 1967 Pontiac made some open chamber heads(i. Our RaceKrafters modified 6X cylinder heads flowed 236 cfm at 0. Find out what the heads are on the 455 and we'll go from there. There are two problems with them - the biggest one for a mild street performance application being that not only are they missing the end bolt holes on the exhaust flange, the material that's normally there that you could simply drill & tap on other heads isn't Apr 11, 2005 · The round-port SD-455 cylinder heads were similar to those found on the R/A-IV and 455 H. or Jul 25, 2024 · The 1970 Pontiac 455 HO engine was a V8 engine that featured a displacement of 455 cubic inches or 7. in. Everything that I have read online all states it is just waaaay to much compression for my motor. com. 020 (something else you must measure yourself to be sure). Speedy car. 73) rocker arms. Find many great new & used options and get the best deals for 1972 Pontiac Vehicles 455ci 250 HP V8 Cylinder Heads 7m5 Dated A192 & A262 at the best online prices at eBay! Free shipping for many products! Jun 10, 2023 · And even though it saw only two years of production, Pontiac illuminati still consider the 455 H. 500-inch lift and 250 cfm at 0. All were stump-pulling torque monsters, but which has the potential to make the most power? Cylinder Heads Forget Jan 3, 2013 · The OP's 4X 455 heads w/a 0. someone out there would buy them if you don't use them. 030” Cometics). one pair freshly rebuilt with bb studs, ferria valves and a 010. Jan 1, 2006 · On the Dyno Iron D-portsThe 455 mule was assembled with the 7K3 heads using Corteco gaskets and stock Pontiac head bolts. This is our first aluminum Pontiac head casting that we have brought to the marketplace. 060 - Pontiac 400-455 Performa (For: Pontiac HO) Opens in a new window or tab Same Day Shipping, 60-Day Returns & Product Details ⬇️ Designed to fit the Ram Air IV style of Pontiac 400/428/455 cylinder heads, these bolt-on turbo headers are the perfect solution to any turbo header packaging concerns. The dyno session was part of the KRE aluminum cylinder head testing and Popular Hot Rodding Engine Masters articles that followed. Except for some special heads Cylinder Head, Performer RPM, Aluminum, Assembled, 72cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each. 96 intake valve and a 1. The May 7, 1973 changeover date is Motor Unit Number 709986 assembled on or about May 7, 1973 May 7, 1973 is the head assembly date, NOT the casting date. Pontiac used different valves and combustion chamber size for their V8s to change compression ratios, fuel economy, and horsepower output. 67 out of 5 stars Pontiac made closed chambered heads until 1967. My first 455 made 455. Just make sure they are not cracked - see if you can get your money back if the heads turn out to be bad. 042" (crushed) head gasket, 6 cc valve reliefs for 400 stock pistons, 5 cc for -. 66: 87: PRESSED IN STUDS – D PORT (B Mar 11, 2022 · I know it's a reach but looking for a set of '71 455 HO heads (will also consider '72). Jan 15, 2007 · A set of 1970 #11 350 heads would be a perfect swap, milled for cleanup (I'd go . 5L/455 Edelbrock Performer Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! All Edelbrock aluminum cylinder heads feature threaded inserts in the rocker studs and exhaust manifold bolt holes for superior strength and durability. It was topped with Rhoads lifters and high ratio (1. FWIW, 72 has a lot of oddball head codes, 7H1,7J2,7K3,7L4,7M5,7F6. Ended up with nearly 12:1 compression with stock parts. Dec 8, 2014 · PY Online Forums - Bringing the Pontiac Hobby Together > General Classic PONTIAC TECH > Pontiac - Street > # 6H 6 heads for 455 Reply: Page 1 of 2: 1: 2 > Thread Tools: Jan 1, 2008 · An In-Depth Look At Some Current Pontiac Cylinder Head Packages On The Market - High Performance Pontiac Magazine The SD-455's cylinder heads (No. BP ports more Pontiac cylinder heads than anyone in the world. 57 + head cc (assuming 6cc for valve relief, 9. 257 x number of cylinders. 66 exhaust. Pontiac 1973-1974 Cylinder Heads; No "H" stamp on early 1973 heads. 023" deck height on 4. Nov 25, 2010 · 87 cc's will put you very close to 9. FREE AND FAST SHIPPING. 96 CC's, screw-in studs, big valve. 060" %428 bored . It managed pump fuel w/o any issues, would even run fine on 87 octane but I typically used 92-93 in it for some margin of safety. Oct 17, 2013 · 2001 Pontiac Trans Am WS6, 6-Speed, LS6 block, TEA LS6 heads, 4" SCAT forged crank, SCAT H-Beam rods, 226/234 cam, McLeod RST clutch, SLP Lid, SLP Power Flo Catback 1980 Pontiac Trans Am Y-84 Bandit WS6, 455 (. Here's a Pontiac site with head ID info: Jun 10, 2020 · I have since pulled the #15 heads for #197 455 HO heads, aluminum intake w/ Q-jet, and factory HO exhaust manifolds on the same short block with the 2802 cam. 030". With the original pistons 0. May 2, 2016 · I used to run 400 casting #670 Pontiac heads on a basically stock 455 short block. Someone at Pontiac in 72 really liked 7's! May 2, 2016 · I used to run 400 casting #670 Pontiac heads on a basically stock 455 short block. it occurs inside Pontiac cylinder heads. Essential to the ’72 455 H. Cylinder Head, Performer RPM, Aluminum, Assembled, 72cc Chamber, 215cc Intake Runner, Pontiac, 389-455, Each. These heads can be ported for optimum performance on a 450 HP street engine or a 700+ HP racing engine, and everything in between. 6%. to work!Thanks Goatman! Nov 7, 2014 · I have a free set of 72cc heads factory d port off a 1969 400 motor that my neighbor gave me after I bought my Firebird with a 455 (7m5) heads. I use and much prefer the smaller valve heads, as the machine shop can get the valves all at the correct height in the chambers. ewtbu tzvnj gqo hifec yefd byff kphqr eeffwbj wtuhgtz jlju