Gm block casting number identification Aug 14, 2001 · Tech / General Engine - Please help me identify casting #14093638 - I have this long block in the garage. Here's a list of Chevy V-8 crankshaft casting numbers. For most Chevy inline-six engines, the casting numbers are located on the passenger side of the engine, near the distributor or on the bell housing flange. For example, the LS7 cylinder head casting number is 452. The block is 3914680, Could be 3914660. the casting number on the driver side back of the block is 3892657 the stamped codes on the front passenger side are CE8 377 VII29XX(D) 41 Oct 14, 2024 · 2. Head casting is 8947040 with the date code B17/8. Before we get into further explanations of Casting Numbers, if you are trying to decipher the VIN plate on the Trucks Drivers Side Door Jamb, you can get that information on our History Page Here. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Blocks were made for each crank main journal size. May 12, 2002 · I also have a 3970010 block. I can also buy the Intake. From what I've read, this engine is a replacement for 71-85. 25:1 or 11. Small block Chevy engine casting numbers serve as vital identifiers that provide crucial insights into the engine’s specifications, production date, and origin. Jul 15, 2014 · Chevrolet Small Block Head Casting Numbers; Casting # Combustion Chamber Size (CCs) Intake Valve Exhaust Valve Production Years Misc. The casting number is usually found at the rear left side of the block, on top of the bellhousing flange. Chevy Casting Number identification including Block casting numbers, cylinder head casting numbers, Crankshaft and intake casting numbers. Oct 4, 2024 · The significance of head casting numbers on Chevrolet 350 engines can’t be overstated for enthusiasts and mechanics alike. All these are identified here. The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head (big blocks can be in the same location or above the timing chain cover, with inline-sixes stamped on the Head Casting Numbers. The engine ID code. Can anyone confirm that 1) it is a Canadian engine. am trying to assist a friend in decoding other GM 6 cyl casting numbers. A spreadsheet listing various engine block casting numbers, their corresponding engine models, and associated year ranges. The Block Casting Number is located at the back ledge of the block behind the driver-side cylinder head. A "two-bolt" main, or a four-bolt main. The casting date code would help nail down the year. There are dozens of numbers used from 1955 through the ’90s, but there are a few standouts that indicate a performance engine. Block Casting Number. Casting Date Example: E038 – (E = Month, 03 = Day, 8 = Last digit of model year (1978)). 1964/1965/1966 283 block casting number 3834810 casting date B 21 6. These codes reveal the engine's specs, production date, and original vehicle. They tell you the year and the model of the engine. 25:1 CR, forging number - 3520 and 7416 Note 4: 4 in stroke, HD, 5140, LS-7, balanced for 12. com and Colvin don't always agree on casting number information. Big Block Chevy Cylinder Head Identification. com Small block casting date is located on driver side rear of block on flange forward of bellhousing. 72 Note 3: 1053, tufftrided, cross drilled, balanced for 9. There are three other pocket guides offered including the "Chevy Small Block 1955-1999 Factory Part & Casting Number Guide", "Chevy Big Block Suffix Codes 1965-1999" and the "Chevy Big Block 1965-1999 Factory Part Number & Casting Number Guide. The number itself can have 6, 7 or 8 numeral digits. Chevrolet Big Block Casting Number Location. 88 exhaust Mar 25, 2001 · I bought a chevy short block from a friend and I am having trouble IDing it. There are sometimes other individual letters found on blocks like “GM” or “CFD” for the Central Foundry Division, but they are not part of the block B: is the Block casting number H: is the Head casting number Serial/Sequence numbers = engine serial/sequence number - includes the model/series-prefix to the engine serial number before 1954; or - includes the model/series prefix and suffix from 1954 and later This code is pressed into the ledge in the block that is just to the rear of the Nov 15, 2024 · To identify a GM 6-cylinder engine, locate the engine code stamped on the engine block, usually near the front for inline engines or by the cylinder head for V6s. Oct 26, 2017 · I have a 1966 nova I recently purchased! It has a ls engine already installed! I’m trying to verify what moter I have so I can make sure to buy the correct parts aka oil filters & so. Chevrolet Small V-8 Cylinder Block Casting Numbers 1955-1985 These listings are always a work-in-progress. Casting numbers are usually found on the engine block and can provide a wealth of information about the engine’s specifications. Sep 14, 2012 · Chevy Small Block - Engine Block Casting Numbers Notes (for below): "High Power" is the maximum rate HP this block was used for, "Low Power" is the lowest rated horsepower RPO engine the block was used in. 00K Casting Numbers: Chevrolet V8 Passenger Cars ID CID Liter Year VIN/Cyl inder Applicat ion Block Crank Head 1 283 4. 00" bore that eliminates the chance of it being a 305. Stamping Numbers: Often located on the front of the engine, these Jan 28, 2001 · Her are the numbers I have found. "Main Caps" is the number of bolts holding the cap. Dec 17, 2011 · The block casting number (drivers rear at back of block) is 3970044. It has the 010 and 020 on the back and front, so I also know it is a high tin/high nickel block. Small Block Chevy Cylinder Head Identification. 1966/1967 396 block casting number 3902406. That number was used up to 1975 Small Block Chevy Intake Manifold Casting Numbers. You can view the complete list of cylinder head numbers here. block 3969717-casting number for 1959-62 261 blocks II = 261 engine (captins bars) F 09030LB F=engine made in Flint 09=the month 30 a date L code for 261 engine. just my feelings on casting numbers verses engine id numbers. 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. Engine Casting Numbers: Chevrolet V8 Passenger Cars 287 July 15, 2014 General Topics 0 13. 5001 74 1971-73: 330862 It also shows the locations of various number and code locations on the block/heads. 60 : over the counter 23 degree, angle plug, 196cc intake runner, aluminum : 10045434: 55 cc : Over the counter 15 degree, angle plug, raised runner, aluminum : 10051101: Hello, I just picked up a decent GM Goodwrench engine, casting #10066036. Years: Casting# CID: Intake Exhaust: CC : Comments : 1971-75: 330545 307,350 1. They are bare. accueil engine code. Mar 22, 2016 · Let me add something else to the mix please. 3836848 is Chevy "W" Motor 348-409 V-8 Casting Numbers. The block's casting number is generally located on the driver side of the block at the rear where the bellhousing bolts to the block. Whether you are an engine builder, drag racer, circle track racer, boat racer, road racer or a hobbyist doing a classic Chevrolet restoration, Mortec has information you can use, starting with our ever-popular Chevy casting number lists for small-block (SBC), big-block (BBC), and 348-409 V-8 engine blocks, cranks and heads. Oct 20, 2024 · Engine Casting Numbers. Make sure your crank will work in the block you have. i have searched the internet and can narrow it down between a '67 302/327/350. Feb 10, 2023 · The first place we typically look is the casting number on the back of the block. Understanding and interpreting Chevy engine block casting numbers is crucial for anyone looking to identify engine specifications accurately. If you are putting a "medium" journal crank from a 350 into a 400 SBC block you can use "spacers" or "thick" main bearings. In 68-69 model cars, the serial (VIN) number of the car the engine was installed in is stamped next to, or under the engine code ID. Another place had the 638 block listed for the 307. The block casting number on smallblock and big block Chevy V-8 motors is located on a ledge found at the rear of the block, most often on the driver's side. Jul 9, 2006 · Colvin's by the numbers book shows "this casting was used from August 1968 to January of 1969 when it was replaced by 3856628. 1967/1968 396 block Dec 12, 2009 · Just picked up a sbc last night and I need help! The story is that it came from a 67 ss chevelle, I got casting #'s today. Feb 9, 2018 · The block casting number is in raised letters, cast into the block on the driver's side rear. Nevertheless, there is a lot to talk about when it comes to casting Nov 22, 2024 · Note the location of the distributor; small block engines usually place it towards the rear of the block, which is a key feature for identification. Two types of crankshafts are offered, cast nodular iron and forged steel. There are sometimes other individual letters found on blocks like “GM” or “CFD” for the Central Foundry Division, but they are not part of the block Sep 19, 2024 · 2. My engine builders software shows it used up until 1985 at least. 6: 58-62: V8: OHV; RWD Hydraulic cam;threaded pulley hole: 3756519 3789935 3794226 3837739 3849852 Jun 29, 2011 · Block casting number 3932386 1972 Chevrolet & GMC Pickups them added to an earlier head. Can anyone help with the engine/block info? Thanks National Corvette Restorers Society Oklahoma Chapter. Oct 17, 2024 · Casting Number Engine Type Specifications Years Used; 3858180: Small Block 350: 350 cubic inches, 300 HP: 1969-1979: 3970010: Small Block 350: 350 cubic inches, various HP ratings Nov 11, 2024 · Importance Of Identification Small Block Chevy Codes. Head 3836850- is the casting number for a 261 head. This block casting number has been used in various Chevrolet V8 engines over the years, and it’s known for its versatility. The engine ID code stamping is located on a flat pad in front of the passenger side cylinder head (big blocks can be in the same location or above the timing chain cover, with inline-sixes stamped on the passenger side of the block behind the distributor). Casting Date Example: E038 - (E = Month, 03 = Day, 8 = Last digit of model year (1978)). We have looked at a number of sites online but have not found anything. The head casting number is located outside the valve cover in plain sight on the driver’s side. There is a big H38 on the back. #471598 is the part number I believe. RECTANGULAR PORT - Valve size 2. Step 1: Locate the casting numbers. If you have any documented info that can be added to these pages, The Block Casting Number designates veries information of the block such as the displacement, the year of production, 2 or 4 bolt main, and also vehicle application. Chevrolet Big Block Heads were offered in many different variations within their 51 years of production. The blob is garbled metal not a paint run, like there was nothing in that space. It includes information on various engine types, their specifications, and the corresponding vehicle models. 1964-1965 327 block casting number 3782870. Block Casting Number: The block casting number is often found at the back of the engine, on the driver’s side. Common 327 Block Casting Oct 4, 2024 · In our experience, accurately matching GM 350 block casting numbers with the correct transmissions and understanding engine codes ensures compatibility and seamless integration. The 3756519 block was used in all the 59-61 chevy vehicle line. Feb 28, 2016 · Looking for original Specs in technical information on the fallowing casting number and partial engine id Casting Number :10243880 Engine ID: 1M0823 8P04. Mar 18, 2024 · The cylinder heads also have a casting number, this is because the heads are often interchangeable between LS engines. Casting Numbers. Nov 10, 2024 · Understanding Chevy Big Block Engine Casting Numbers. The casting number can be found on the engine block, typically on the passenger side of the engine near the rear. Common casting numbers for performance engines include 3970010, but ours reads 3956618, another great number to put in your memory bank. Mar 16, 2024 · The engine block casting number “14010202” is associated with a small-block Chevrolet V8 engine. I looked at the casting numbers and all I get is: 350 cid 2 or 4 bolt main 87-95(altough I got it from a '92 Chevy Truck) Roller or flat tappet cam One peiece rear seal. I have a 69 c10 step side. GM body designation. Just for the record, there were some ’86 blocks shipped with pans for ’85 service replacements, so it is possible for a customer to have an ’85 car or Aug 14, 2008 · This is how I decifer the casting numbers that really mean anything. Quickly, A = Chevelle, F = Camaro, X = Nova. Block number what year eng. g. The casting date is I 3 9, so I assume it is late 69/early 70 block, and is a 4 blt main block. They might look like this 361959 or 3970010 or 14015445. my 1951 Chevy Truck Engine ID number? The engine number is pm. Big block on the right side of engine above the oil pan rails. The Engine ID Code typically comes first and consists of one or two letters. Casting # carb style Years made HP levels Notes; 3731394: Dual Quad: 56-57: 225, 245 & 270: Aluminum 283 dual quad Chevrolet Big Block Cylinder Head Casting Numbers. All original one owner truck (my father in law) so i know its the original engine. These numbers are often found on the side or rear of the engine block and are essential for determining the type and year of the engine Oct 14, 2015 · The #3970010 block casting number is for a 4. The block casting numbers do not have any letters in them. Can anybody help?<HR></BLOCKQUOTE> I checked the numbers again and that is what they are. The document organizes information by engine type, providing relevant identification and specifications for various LS engines. We do not know what the engine came out of. Block casting number: 3914678 Casting date: K67 Engine stamp located on the forward end of left-hand cylinder bank: VII29YC Cast code at timing chain: HB G31 678 Cast code at the rear of block: H31 636 678 Cylinder head number: 380545 Crankshaft number: 4672 Piston number: 3796494 The car was in a nasty front Block Casting Numbers. Another place on that rear ledge I see "GM16" (maybe GMI6). Dec 15, 2011 · block PDF. Step 2: Clean the area The matrix on the right is the Engine Casting Numbers and should prove to get you the ID, Make and Year of your Engine. This will show you how to also look up the 1964-1965 327 block casting number 3782870. Chevrolet engine casting numbers are molded into the metal when the engine block, head, or other major components are manufactured. May 3, 2018 · Chevy 292 motor ME 13594 eng. 02: 1. The heads have a triangle casting on the end where the double hump is on the other heads I have and the guy called them wedge heads? Big Block Chevy V-8 Casting Numbers. Chevy big block engine casting numbers are critical for identifying engine specifications and performance characteristics. This number can be cross-referenced with manufacturer databases for precise Nov 1, 2013 · The format consists of divisional identification number, model year, assembly plant designation and vehicle serial or sequence number. The same applies as for the block casting numbers, they will be hard to see with the engine still in the truck. There are sometimes individual letters found on blocks like GM or CFD for the Central Foundry Division, but they are not part of the block casting number. 1966 396 block casting number 3855961. Engine Size (ci) 10033867: 62cc: 2. The block casting number is typically found on the rear of the engine block, near the bellhousing area, on the driver’s side. Jul 15, 2014 · ID CID Liter Year VIN/Cylinder Application Block Crank Head; 1: 283 4. Apr 14, 2023 · Additionally, some engines may have multiple casting numbers associated with them. On the back, where the Jan 28, 2014 · A spreadsheet that lists LS engine casting numbers and corresponding part numbers. I need to know what the correct crank # would be if It could be built to a 435 hp spec. Like ZZ4 engine identification, Chevy engine identification can be done based on the block casting numbers. 6 58-62 V8 OHV; RWD H ydraulic cam;thre aded pulley hole 3756519 3789935 3794226 3837739 3849852 3735236 3836266 3815822 3731554 3748770 There are three block casting number types to look for: the block CASTING NUMBER, the block CASTING DATE and the ENGINE ASSEMBLY DATE/SUFFIX CODE. Open vs. These numbers are usually found on the side of the block or cylinder head and can be used to identify specific components. I believe it is a 350. I am planning on putting it in my 86 k20. It had a two-piece rear seal, a flat tappet cam and a fuel pump hole because all of the trucks still had carburetors. Dec 4, 2013 · Block Casting Number Identification. May 5, 2009 · A documentation that provides a detailed list of casting numbers and part numbers related to LS-based engines. Engine Assembly Date/Suffix Code: Aug 1, 2009 · Here's the applications that I found: 3970014 350 69-77 Pass,Chevelle,Camaro, Nova,Monte Carlo 2 or 4 bolt main 3970014 350 69-79 Truck 2 or 4 bolt main Casting Date Small block casting date is located on driver side rear of block on flange forward of bellhousing. Important: If you don't know where to look on your engine for all of the casting numbers, casting dates and suffix codes, see Chevy V-8 Casting Number Locations page 1 and page 2. May 3, 2009 · "Help. I would say that after the 0010 blocks it is probably the most common block casting number. The number on the R/F pad is VH27280O, the number on the bell housing flange is 14016379, and the date stamp is H 24 2. Apr 28, 2015 · It is a 4 bolt main with a suffix number on the front pad (T1121LS) I also have Alum heads, Casting #3946074. GM Production of the Chevy Big Block engine began in 1958 with the Mark I W Series and ended with the Gen VII in 2009. Chevrolet Big Block Heads. the casting code on the block is 3981968 then GM and the number 50 under that. Jun 20, 2017 · 1985: The original block in ’85 was a 14071177 casting. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. You've got a 1974 350, likely a 4-bolt main as it was for HD and Police use and came with a Turbo Hydramatic 400 transmission. Chevy V8 Crankshaft Casting Numbers. I have a 231 v6 engine casting number Dec 3, 2023 · The stamping pad generally has a series of alphanumeric characters. This is a place to find like minded individuals to support your passion, whether you are driving a brand new Apr 21, 2021 · The 3956618 block casting number was used for many many years. It's generally thought that the letters "P" and "T" represent "Passenger" and "Truck" but there's no evidence of this as of yet. The identification numbers for the 454 engine usually consist of two main parts: Casting Numbers: These are typically found on the engine block and indicate the specific design of the engine. In a similar location, but on the passenger side rear of the block is the casting date code, also in raised letters cast into the block. Understanding these numbers is essential for anyone looking to rebuild, restore, or customize a small block engine. If you don't know where to look on your engine for all of the casting numbers, casting dates and suffix codes, see Chevy V-8 Casting Number Locations Page 1 and Page 2. 5:1 CR, tufftrided, cross drilled Note 5: tufftrided, 5140, with 7/16 in bolt rods, tufftrided, cross drilled, forging number - 7115. I was told that all I need to do is change out the flywheel with an aftermarket one. The Oklahoma NCRS Chapter members hold regular monthly meetings to share our interest in the Corvette. No one seems to think this correct, but that is what it is. On different sites I've seen the 636 block as listed for the 307. Trying to see if it's the 250CI as well. Oct 4, 2021 · The small block Chevy has been the predominant engine swap candidate from about a week after the first engine block casting cooled in the mid-1950s. Chevrolet documentation shows that the 3832386 block was only sued as a 4-bolt block, but it is possible that 2-bolt blocks could exist. Nov 28, 2022 · Cast or stamped numbers are used to help identify each Chevrolet Big Block engine. Jul 26, 2022 · Key Identification Methods: Casting Numbers: These numbers can usually be found on the rear of the engine block. Aug 15, 2024 · Chevrolet engine casting numbers are unique identifiers stamped on engine blocks for identification purposes. These numbers help determine engine specifications and compatibility with other parts, such as cylinder heads and crankshafts. Dec 10, 2007 · Also, the numbers are specific to the size of engine in the Corvette. , a 283 or 350). Very This How to video will show you how to find or locate the casting numbers on your small block chevy engine block. 3782870 is for a 1962-1963 (or 1964?) block casting number. Aug 17, 2023 · Engine Casting Numbers. 1967 327 block casting number 3892657. The identification small block Chevy engine codes play a crucial role in understanding the specific characteristics of your engine. Chevy V8 Casting Number Locations Chevy V8 SBC Block and Head Casting Numbers Chevy V8 BBC Block and Head Casting Numbers Chevy V8 "W" Motor 348-409 Casting Numbers Chevy V8 Crankshaft Casting Numbers Chevy V8 Crankshaft Journal Sizes Chevy V8 Bore and Stroke List Chevy V8 Notes SBC Crate Motors BBC Crate Motors SBC Cylinder Heads Holley Carb Small block casting date is located on driver side rear of block on flange forward of bellhousing. These codes enable car enthusiasts, mechanics, and collectors to determine essential details such as the engine’s year of manufacture, model, and any factory The number itself can have 6, 7 or 8 numeral digits. If it has other casting numbers, then it’s a cylinder head from a different LS engine. 283’s, 327’s and 427’s all had their own casting numbers specific to individual years, so for the process of documenting a Corvette engine, the casting number will be used to confirm that that block was used in a Corvette and that it was available during the same year Big Block Chevy Cylinder Heads Open vs. Oct 20, 2011 · All crankshafts have a casting number located on one of the rough finished throws or counterweights towards the front of the crank. Cylinder Head Casting Numbers. Aug 26, 2021 · On a small block Chevrolet, the casting number is found at the rear of the block on the driver's side (as is with Chevy's big block engines). It details LS1, LS2, LS3, and other engine models, providing specific casting numbers and the years they were used, including notes on known year ranges for some entries. Cross-reference this code and any visible casting numbers with GM databases or parts catalogs to confirm the engine’s type, production year, and specifications. Corvette enthusiasts from Oklahoma and surrounding states who join together to celebrate and enjoy the Chevrolet Corvette. Chevrolet Big Block Cylinder Head Casting Numbers. He has an engine out of a 1968 Pontiac Beaumont ( like Chevelle) which has the block casting number 3994257 . However, in the aftermarket production of heads, blocks or complete engines continue till this day. May 29, 2021 · 3756519 engine identification help. What really concerns me is the block casting number. These numbers are typically located on the engine block and provide essential information about the engine’s size, production year, and specific model. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. If you're looking at the engine code - this is already known. Optimal performance is achieved by paying close attention to the specific details of each engine component. . Chevrolet. This content is useful for automotive enthusiasts and professionals needing detailed information on LS engine components. The block casting number is the single most important number on a block because it will probably be the last number on a block to be altered or changed to counterfeit or misrepresent a block. Small Block Chevy Suffix Codes: CE - CMJ. 1964-1966 283 block casting number 3849852. Looking for Chevy casting numbers ? This is a very complete list of numbers to help identify your Chevy engine block, heads and crankshaft. The big-block engine casting numbers serve as a means of distinguishing an engine block by designating the casting number, the year of manufacturing, and the CID (cubic-inch displacement). Specifically, it is often referred to as the “020” or “0202” block. B is some engine related option such as a hydrovac. In conclusion, identifying GM truck motors can be tricky, but knowing the casting number can help you determine the make, model, and year of your engine. VIN: The vehicle identification number on your car typically has information about the engine size and model. Oct 28, 2024 · Key Components of the Identification Numbers. 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. Small Block Chevy Head ID; Engine RPO Numbers: These are also located on the drivers side of the engine, at the back of the head on the transmission mounting flange. They might look like this “361959” or “3970010” or “14015445”. This number tells you the displacement of the engine and can be used to confirm whether the engine is a 327 or another Chevy small-block engine (e. These can be broken down into three main sections: the Engine ID Code, the Engine Production Code, and the Partial VIN (Vehicle Identification Number). 72 1. But what about the other #s on it. Jan 26, 2011 · Hi everyone, I have a block i am trying to figure out exactly what it is. 075" of the stuff still on there. The number on the passenger side of engine on the pad are 14L192810 then 10219CMA. 00" bore block, so because of that block casting number and the 4. You can see the block casting numbers on the engine block on the passenger’s side of the engine, below and to the right of the distributor. There is a laser etched number on the block on the driver’s side 6300165185 the casting in the heads are 243 aluminum heads & block The number itself can have 6, 7 or 8 numeral digits. Casting # 3933163. 19 intake, 1. the fallowing is what I've come up with (not sure if accurate) It's a Small Block Chevy block built in Mexico somewhere near August (or possibly June) 23rd of 1996. 2) what the displacement is. From my research, I think the block is the 335 hp but not sure. 88 exhaust Pontiac/chevy aluminium small port /race: 10051128: May 17, 2008 · There is a little carbon at the top of the bore granted, but I scraped most of it off and there definitely isn't . Only Chevelle-specific information is listed here to conserve space. " Looks like Mortec. See full list on chevyhardcore. These block castings were used in various other models of the Chevrolet lineup such as the passenger car, Chevy II/Nova, Camaro and Corvette. 1971-75: 330545 307,350 1. The head also has important casting numbers. In my research, I found very little information for heads manufactured between 1954 and 1962, but I found the three most popular. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. This little gem of an engine has seen displacement from 262 to 400 cubic inches in its 50 plus years of existence. Oct 19, 2024 · Interpreting Chevy Engine Block Casting Numbers For Identification. 348-409 Chevrolet Engine Block Casting Numbers Move cursor over the various items below to show their location. On a small block Chevrolet, the casting number is found at the rear of the block on the driver's side (as is with Chevy's big block engines). " These four books do include passenger, truck, marine and industrial engine applications. what does this represent? Near the oil filter is 371 386 83 N Jan 28, 2008 · My big block is a #140154445, a truck block from 78-90(?) On the back of the casting I looked for a date, and found "0 2 blob 3". 5001 74 1971-73: 330862 Oct 20, 2024 · The Importance Of Small Block Chevy Engine Casting Numbers. Small Block Chevy Engine RPO #'s; Engine Summary 1970 - Current: Oct 19, 2024 · To identify a Chevy 396 engine, check the casting number, suffix code, block date, and partial VIN. 1965/1966 396 block casting number 3855962. BBC Exhaust Manifold Casting Numbers Apr 12, 2014 · Chevrolet Engine Block Casting Numbers April 12, 2014 Roadkill Customs Technical Info All engines are stamped with an engine ID code, consisting of assembly plant code, production date, and suffix code. Most sites seem to show the 638 block as being the 4" bore block. Same goes for the heads.
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