Chevy head casting 3998983. Open-chamber designs are larger and provide lower .
Chevy head casting 3998983 Jul 11, 2009 · Hey guys, I told you before that I found out that my 67' Biscayne appears to have a 307 in it (block casting number- 3970020). This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. Oct 19, 2022 · Do you wish to know the casting numbers for big block chevy? Find out everything about casting numbers with our detailed chart and more. Thanks Mike How to Use Enter a casting number in the search box above Click Search or press Enter View results with detailed part information About Casting Numbers Casting numbers are identification codes cast into engine blocks, cylinder heads, and other components during manufacturing. The block casting number on small block and big block Chevy V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. 14 (251 Votes) May 2, 2004 · Need to know intake/exaust valve sizes as well as how many cc's the runners are. 72-inch exhaust valves. Open-chamber designs are larger and provide lower Sep 14, 2023 · How do you tell a Chevy engines size? A small or big block Chevy have a casting number on the top of the block behind the driver side head. Mar 3, 2006 · Assume you have a stock flat top pistoned 327, a set of 76cc 993 heads puts your compression in the low, low 8's. the engine is a 350 Steel crank, 4 bolt main, 9. Other than the cam lobe all the other items including pitons are in very good shape. Nov 12, 2007 · Chevy claims the compression is a wheezy 8. Apr 11, 2015 · Big Block Chevy Engine Parts casting numbers and IdentificationBig Block Chevy Cylinder Heads Open vs. 19 intake, 1. I want about 10-1. I want to use the block, crank (pistons???) and heads and build a daily driver motor. If you have ever heard that the new style 235 gets better compression numbers with an "848" Head, look for the last three numbers of that Casting Number. 5001 - 1970-80 333882 350,400 1. 5:1 compression ratio with these heads, comp cams . I don't want to do any machine work just wondering what's the limit with these heads. Looking for Chevrolet cylinder heads online? Explore our complete collection of Chevrolet remanufactured cylinder heads for Cars at the best prices. They also produced heads in cast iron or in aluminum to achieve different power output and performance. Chevrolet Head Casting Number Reference Small Blocks 330545 350, 73, Corvette, 76cc, 2. I have a SBC Head Casting Numbers Head casting numbers and the head casting date are located under the valve covers, in the rocker arm valley. 02 1. Chevy casting numbers for blocks and heads for big block V8 engines. 1. Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. 993's are a decent heavy 76cc casting, with the vast majority of them having 1. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. 5 76 1973-80 340292 350 2. Id also point out that the newer port designs YEARS CASTING# CID Intake Exhaust CC COMMENTS 1971-75 330545 307,350 1. He finished the three yr resto on it and put this engine combo in. Lightweight castings (not for hi-perf use) have �scalloped� edge below exhaust ports; regular have straight edge How to decode and identify a small block chevy engine Nov 3, 2009 · The oval port casting numbers of interest are 336781, 353049, 3992241, and 3993820, which were originally installed on '71-'74 402 and 454 engines. The numbers come as follow: 3884520 GM 4 T^-(big triangle lol) 0238-(may be 0288) Feb 20, 2019 · That’s why we have put together this short big-block Chevy head ID guide to help you identify that swap-meet gold. 269). What would be the best piston, cam, intake, carb combination for the build? What would you suggest. 5 valves 76cc. These castings were originally equipped with 2. Find Your Cylinder Head 10% off on all gasket sets with the purchase of a cylinder head. Only Chevelle-specific information is listed here to conserve space. The casting quality is as good as the best aftermarket iron heads, and its flow capability on a valve-size-for-size basis more than matches the Phase 6 aluminum Bowtie heads. 480 lift with 230/230 Duration at 0. Dec 28, 2016 · I've got presumably stock 997s on my 70-72 400 small block. 6 66 1975-76 354434 262,305 1. Bowls will get very thin. 376455 350, 77-85 Dec 12, 2018 · To help you answer that question, we have put together this cylinder head ID listing of Gen-I and Gen-II small-block Chevy heads. 1:1, but after the test was over, we measured everything and cam up with a slightly better 8. Jan 28, 2009 · Are these a good casting to run on my 64 283 with flat tops, 4 spd. Find many great new & used options and get the best deals for Pair SBC Small Block Chevy Cylinder Heads 3998993 at the best online prices at eBay! Free shipping for many products! Small Block Head Casting Numbers(In no particular order) Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. High-performance efforts have always begun by improving upon what the factory built, and the smallblock Chevy is the poster child for that effort. 6 valves 333881 350, 74-75, 76cc, 2. Oct 13, 2006 · I have a set of Chevy heads with a casting number of 333882, with 1. I found tonight that I appear to have some powerpack 283 heads on it as well lol. 5 - 1975-76 367450 262,305 1. Jan 7, 2005 · Casting #3998983. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. Found a set of heads . 88 exhaust This is probably the best cylinder head casting that Chevrolet has ever produced for a production small block Chevy. Jan 7, 2009 · casting numbers 3998993. Is head 3836848 actually more desirable? If so, why? Jul 13, 2012 · Here we are with another head question for my budget de-smogger build. Needs to be freshened up, contact dave PLEASE CHECK YOUR CASTING NUMBER TO MAKE SURE THAT YOU ORDER THE CORRECT HEAD. Shrouding is also compounded with the larger valve. I would do a valve Chevrolet Small Block Heads Casting Numbers, Information and Specification. First letter (A through M) is month (Jan through Dec) (I not used), one or two digits for day of month, one digit for last digit of year cast. This is a quick walk through the history and evolution of some of the better production heads, but […] chevy head casting numbers for Camaro, Corvette and stovebolt trucks Nov 22, 2010 · Ive frequently heard guys ask if they can swap the better breathing open chamber heads onto the older close chamber engine short blocks, and if the older closed chamber pistons will work with the newer open chamber heads? the newer open chamber heads may breath better but they are also slightly more detonation prone as they have less quench area. 02 ,1. 50 inch valves. Mar 1, 2006 · I have a set of #3998920 heads 1. Aug 5, 2024 · Locating Casting Numbers on Big-Block Chevy Cylinder Heads When identifying casting numbers on big-block Chevy cylinder heads, the numbers can typically be found in the rocker arm valley. Please let me know if you have any info on them. 4:1. No offroad, no racing just driving. I have a 3970010 block with 3998991 heads on it. in my opinion I would get rid of them they are the only heads we found from that timeframe that were actually stated as low-performance heads. During their visit to the shop the machinist found a crack coming out of the seat of one of the exhaust valves. 06- and 1. Aug 15, 2024 · Chevrolet engine casting numbers are unique identifiers stamped on engine blocks for identification purposes. 94 Casting dates are l 1/8 and k pair of original 200hp,327 210hp, 327 235hp heads for a 1969 Chevalier,Camry,Chevy ii and full size cars. Apr 25, 2025 · The significance of head casting numbers on Chevrolet 350 engines can’t be overstated for enthusiasts and mechanics alike. 5001 - 1969-79 376495 350 - - 1970-73 399380 400 1978 Oct 25, 2015 · Re: 997 casting sb Chevy heads by Carnut1 » Sun Oct 25, 2015 1:18 am I love 2. and small flat tappet solid lifter cam? Feb 21, 2011 · C3 Tech/Performance - 1972 SBC Cylinder Head Identification - Took the valve covers off last night to get an idea of what I'm working with while I start putting together the plan for rebuilding my stock 350. Going in a 7000 pound weekend driver pickup. 7 OHV Cylinder Head 906 / 062 SBC L31 350 VORTEC 1996 - 2002 May 16, 2008 · Hey everyone. 6 Is there a way to visually tell if these are the larger ports from the 302 / 327 as opposed to the lamer 350 1. They were on a 4bolt with a medium cam. 30 over with a Chevelle V8 Cylinder Head Casting Numbers - 1964 through 1972 These head castings were used in various other models of the Chevrolet lineup such as the passenger car, Chevy II/Nova, Camaro and Corvette. Chevy small-block engine head casting numbers identify the model year, horsepower range, valve and chamber size and the size of the intake and exhaust ports. Never built a 400 casting. . These are perfect heads for any vintage Chevrolet small block with today's low octane gas. It had already left the Jul 15, 2014 · Head Casting Numbers: Chevrolet Small Block Engines Estimated Reading Time: 6 Minutes 286 July 15, 2014 General Topics 0 182K Rating: 4. 02-1. 5001 - 1969-79 376495 350 - - 1970-73 399380 400 1978 YEARS CASTING# CID Intake Exhaust CC COMMENTS 1971-75 330545 307,350 1. 5001 - Chevy casting numbers for blocks and heads for small block V8 engines by Mortec. 94 1. 5001 - 1971-76 333881 350 1. Big-Block Chevy Cylinder Head Casting Numbers 330864: ’68 through ’84 oval port, open chamber, 2. 72-inch valves. Apr 3, 2002 · C3 Tech/Performance - Commentary on functional replacement heads, casting #3998993 - Hey Guys, Recently I had pulled my '73 L-48 heads off (casting 3998993) to get them redone. The numbers I read off the heads were the following: 8998998 R133 Searching for the 8998998 casting number To accommodate all these applications the heads were designed with different combustion chambers, valve sizes, and port dimensions. The real issue is getting the bowl big enough to feed that valve. Chevy Chevrolet small block V8 engine casting numbers - WaywardGarage. 055 in stock Chevy heads. Order now! Here is a single 68 big block head, its 215 casting closed chamber hi compression head, oval port, asking 180. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Jul 3, 2007 · The heads will need 2. I looked it up and this is what I found: 3998993 307, 350, 76cc, 72-73, 15-164/64cc ports, 73 had hard seats 3998993 350 Crate motor, current, Hecho En Mexico, 159/64cc ports how do I know which ones I have? I'm putting in a 350 bored . MorTec has Chevy casting numbers listed online. We have real matching pairs, most heads have 1. I was told when I got my Z that the guy he got it from at one point put the original motor in his truck. They help identify: Part specifications and capabilities Year range of production Applications and compatibility Performance characteristics Questions? Comments? Join our Discord and let's talk!. The good news with this low compression is that the Goodwrench engine should even run on 87-octane gas. 5001 74 1971-73 330862 400 1. don't know alot about Apr 13, 2015 · Casting markings on the end of the Gen I cylinder heads, which help identify which casting the individual heads are. These numbers, found stamped on the heads of Chevy small-block engines, serve as a detailed fingerprint, allowing us to identify the capabilities, design changes, and applications of any particular head. " He was referring to head with casting number 3836848. The first small-block with a 4-inch bore came in the 1962 Corvette 327ci, and it really opened eyes. Chevrolet Big Block Heads Combustion chamber types All early Chevy Big-Blocks used closed chambered heads. They help identify: Part specifications and capabilities Year range of production Applications and compatibility Sep 14, 2006 · Small Block Chevy Cylinder Head Identification Chevy Cylinder Head Casting Numbers Years Casting# CID Intake Exhaust CC Comments 1971-75 330545 307,350 1. REQUIRES SLOTTED ROCKERS Special Notes: REQUIRES SLOTTED ROCKER ARMS. For a stock cammed engine, these heads will function well enough and allow you to run on 87 octane fuel. Featuring the famous double hump marking on the ends of the heads, the #3782461 and #3782461X heads used 1. From Stock to Modified. Dec 21, 2021 · Chevy 5. Every step of the small-block Chevy’s performance history has originated out of production parts. I already know they're 76 cc chambers. Quick question for all the number savvy people. 6 valves 333882 350-400, 74-80, 76cc, 160/60cc ports 340292 "Turbo" Over Counter Angle Plug, 64cc, 2. 50 valves. Some casting numbers are NOT listed as they may have been used in other models of the Chevrolet lineup but were NOT used in May 31, 2007 · A buddy of mine has a 69 chevy that has those exact heads. This engine is not my final but I want to fix it right so I can sell it honestly. Now, when the question “what heads are these, and will they work for me?” arises while walking around a swap meet, you can at least know what is sitting on the ground or table in front of you. 480/. 94 Heads, i am hoping to make 350-375HP with them. com - Hot Rods - Musclecars - Project Cars - Farm Trucks The Head Casting number is located outside of the Valve Cover in plain site on the Drivers Side. These numbers help determine engine specifications and compatibility with other parts, such as cylinder heads and crankshafts. The most common heads sought by engine builders are ones identified variously as the "Camel Back," "Double Hump" or "Humper" heads used on a range of passenger cars and performance vehicles. Looking for Chevy casting numbers ? This is a very complete list of numbers to help identify your Chevy engine block, heads and crankshaft. 3917291 supposedly with 2. & Date codes are cast on top of head (under valve cover) between second & third rocker arms from left. Looking for a small cam that match these heads. 6 valves 354434 262-267-305, 75-79, 163/57cc ports LW casting 358741 305, 76-79 376450 262-305-350, 84-81, 168/60cc ports, 7 bolt ex. 72 1. IF YOU ARE UNSURE PLEASE CALL US AT 1-888-920-0052 Description: CHEVROLET ENGINE, CENTER BOLT VALVE COVERS, ROUND PUSHROD HOLES. 06-inch intake and 1. 5? Apparently either one is rated at about 63 Ultimate 348-409 Guide - Cylinder Heads - Includes Restoration, Performance Upgrades, Durability Modifications. 50, 600cfm edelbrock carb, Performer This is for a Pair, (2 heads), of Bare, (Not Exactly Like the Complete File Photo Examples Sold Previously), for a Mid Year 1966 or Early 67 1967 Used Chevrolet SBC, (Small Block Chevy), Double Hump, (Sometimes called "Fuelly", "Fuelie" Heads), Used Cylinder Heads in Good Condition, (GM Casting Number 3890462, GM Group Number 0. 3 62 1976-79 358741 305 1. Sep 28, 2007 · was just wondering what anyone thinks about these heads 3998993 (68-76) Dec 11, 2010 · Info on small block head 3998993 and comments on my setup Engine & Drivetrain Jan 19, 2021 · Technical Confused sbc head question Discussion in ' The Hokey Ass Message Board ' started by olds vroom, Jan 19, 2021. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads Jan 14, 2011 · In a discussion on Stovebolt Forum (on 10/17/10) Denny Graham makes the statement, "We've all heard how the 848 head is the head that you want to use . I believe they are very similar to 993 open chamber head. 94/1. Some pistons have scuffing on the sides so I believe I should change them but to what. About Casting Numbers Casting numbers are identification codes cast into engine blocks, cylinder heads, and other components during manufacturing. Thanks. 6 valves , screwin studs and guideplates ,bigger spring pockets,downcut guides ,it would be smart to open up the pushrod holes, and THEN THE 30HRS OF PORT AND BOWL WORK!! Those heads were used with the target crate engines, and are one of the better (heavy weight) heads chevy made in the 75-76 cc range. Here’s a detailed breakdown of where to look and what to expect: Location of Casting Numbers: – The casting numbers for big-block Chevy cylinder heads are typically located in the rocker arm valley, and Casting no�s. 3 - 1980-84 376445 350 1. Used on 396ci, 402ci, 366ci truck, 427ci truck, and 454ci truck. 02/1. The Chevrolet Small Block was introduced in 1955 Nov 22, 2009 · Heads are 3998991's This seems to be a low compression smogger type motor. cxxsh tvolc wcs btjyfxb qlclz skj tjy cecj qadf wqkv jmect gwrw wlej gjlcnc ypgetow