Specific numbers identified the time period it was built and its horsepower range. The numbers appear on the engine block, behind the distributor assembly. Road grime may be covering the number. Used on 396ci, 402ci, 366ci truck, 427ci truck, and 454ci truck. Since itâs fairly obvious that youâre looking at an engine block, the important digits are the first four and last one, two, or even three digits in some cases. Used on 396ci, 402ci, 366ci truck, 427ci truck, and 454ci truck. No current information about 6-cyl castings are available. Chevy cylinder head Identification - Small block casting numbers, Big block cylinder head, camel back heads, double hump heads The matrix below is for Chevelle applications only although many were used in ⦠The prefix letter identifies where the engine was built, model year and model type - "F" ~ Flint, "T" ~ Tonawanda. The code consists of an assembly plant ⦠Casting Date. Two types of crankshafts are offered, cast nodular iron and forged steel. Choose Group to View Engine Block Codes Engine Block Codes for CID 350 . If you are thinking about buying what someone claims is a ZL1 or aluminum big-block Chevy engine, have an experienced ⦠Click the link for more information about that item. Casting Number. This engine Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange. Check the engine code suffix against a ⦠Casting Number Mains Deck Height Year 402 CI Blocks #3969854 2 or 4 Bolt 9.8 70-72 #3999290 Truck 2 or 4 Bolt 9.8 70-72 #3999290 Pass 2 or 4 Bolt 9.8 72-----Casting Number Mains Deck Height Year 427 CI Blocks #340220 4-Bolt 10.2 68-85 #364776 4-Bolt 10.2 68-85 #473478 4-Bolt 10.2 77-90 #3782870 4-Bolt 10.2 68-76 #3855961 2-Bolt 9.8 66 ⦠Post n°1; GM- L6 Enginne Block Casting Numbers. It features numbers and letters, with a prefix and a suffix. The numbers ⦠That block casting number was also used in 1964 ⦠The Chevrolet engine ID number is usually seven to eight digits long. Numbers and locations as follows: Engine block stamp (on flat plate by dist.) Often hidden by the alterator. GM- L6 Enginne Block Casting Numbers. The middle number or numbers indicate the day of the month it was cast (1 through 31). Locate the block casting number. All Engine numbers start at 1001. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. If you have some information you want to share with us and our visitors, please stop by the forum and leave us a post! 348-409 Chevrolet Engine Block Casting Numbers. 3837004 I've gone to the Hemmings and Inliners sites linked to in the previous posts and cannot find ⦠It can be machined for 2.20/1.60-inch valves. Chevy/Olds Rocket block 4.00"-4.190" bores 400 mains journal sizes splayed steel caps wet sump raised cam 2-piece rear seal 9.300" deck We would like to thank everyone that has contributed to the data provided on this site. DanTheVanMan ; DanTheVanMan Commissioner Number of posts: 7824 Location: *** Sunny Fernandina Beach, Florida *** Age: 59 Registration date : 2008-10-08. Attachments. The casting number on Chevy V8âs is located on the drivers side of the engine where the block is connected to the bellhousing. They are notoriously very hard to read and often people make the mistake of thinking a '3' is an '8'. FIII5H (These are the letter "I") Head casting # 3836848 Manifild casting # 3836822 Engine block casting # (below and right of dist.) Move cursor over the various items below to show their location. We are currently limiting the listings to Chevy V-8 blocks, cranks and heads. 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. The Engine Block Casting code is one of the best ways to identify a Chevy engine block. The PO says it came out of a '57 Chevy truck. A typical Chevrolet engine number will read V0225FF; the suffix may consist of either two or three letters---in this case, "FF." Any intake manifold (LS1, LS6, LS2) will work with these heads as well as Vortec intakes from cathedral port headed variants. 330865: â68 through â84 oval port, open chamber, 2.06- and 1.72-inch valves. The primary pieces of information you'll decode are the; Engine Code and ; Partial VIN. Since forged cranks are more expensive to produce, they are generally used only in high performance or ⦠It can be a bit hard to see with the ignition shielding in place but the numbers are fairly large. The other engine has the following numbers (and very hard to read because of ⦠Small Block Chevy Crankshafts. Fordâs part number convention generally follows the format of a four digit casting code, followed by a four digit basic part number, which will be â6015â for an engine block, followed by the revision version. This Casting number is usually found at the rear of the block on the left or drivers side on top of the bellhousing flange. by DanTheVanMan on Sun Mar 29, 2009 7:34 pm. Big-Block Chevy Cylinder Head Casting Numbers. The block casting number on small block and big block Chevrolet V8 motors is located on a ledge found at the rear of the block, most often on the driver's side. 330864: â68 through â84 oval port, open chamber, 2.06- and 1.72-inch valves. The Chevy V8 block casting number is generally atop the transmission mounting area of the block. Four bolt main blocks are desirable in high ⦠Note: It is common practice to use just the last three numbers of the c/n when dealing with casting numbers, i.e. "Main Caps" is the number of bolts holding the cap. T = Tall deck, 10.2" deck height 1991 and later Gen.V, VI and VII production BBC motors have one-piece rear main crank seals. The engine code and partial vin # will accurately nail down ⦠General Decoding Information This topic can be somewhat confusing, especially with the amount of information available and the interpretation of it. 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. The suffix ⦠On a front wheel-drive, look behind the distributor. 6-cylinder ENGINE NUMBER is located on the right side of the block to the rear of the distributor. If you have any documented info that can be added to these pages, please contact me and let me know. The last one or two numbers indicate ⦠All crankshafts have a casting number located on one of the rough finished throws or counterweights towards the front of the crank. block c/n 10243880 would be called an "880" block⦠Chevrolet Small V-8 Cylinder Block Casting Numbers 1955-1985 These listings are always a work-in-progress. The casting number on my 1966 is 3858174 which is identified as a 327 ci V8 block. Warnings. This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bell housing. V8 Block & Head Casting Numbers. Maybe this can halp some of you with your ⦠The 327 Chevy engine is stamped on a machined pad on the front passenger side cylinder head usually behind the alternator. Decode the engine ID number. On earlier 1940s and 1950s models, the engine number may appear next to the dipstick. The Engine Block Casting code is one of the best ways to identify a Chevy engine block. Typically, the date code starts with a letter that signifies the month cast: âAâ equals January, âBâ equals February, and so on. If you are having trouble locating the casting number, use an automotive solvent to clean the bell housing flange. Big Block Chevy Cylinder Heads Open vs. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. Casting number 12558062 is a Vortec head that is available from Chevrolet Performance. According to MRE-Books' small block Chevrolet engine block page, the numerical code is up to eight digits long. Location. SBC Crank Casting Numbers. 8-cylinder ENGINE NUMBER is on pad on front right hand side of the block behind the water pump. It is completely assembled with 1.94/1.50-inch valves, and 64 cc combustion chambers. 330866: â68 through â78 oval port, open ⦠The location of this code depends on the type of engine, typically as follows: Small Block Chevy: Machined pad in front of the passenger side cylinder head. Reference the number to a listing of known Chevrolet 4.3L casting numbers, similar to the ⦠Numbers-Codes-Dipstick Block Casting Number location 1958-62 Block Date Code location 1963-65 Block Date Code location Block Stamping Pad location "X" on block location 348 Dipstick location 409 Dipstick location ⦠This ledge is below the deck of the block and the ledge forms the mating surface between the block and the transmission bellhousing. Number Identification. As new castings are released on late models, ⦠Clean the area thoroughly and use a nice bright flashlight. Big Block Chevy: Machined pad in front of the passenger side cylinder head or ⦠This is usually a 7 digit number and each letter/number is about 1/2" tall. One engine has the following numbers near the distributor: FI026J I presume this is a Chevy engine since the valve cover sez Chevrolet. According to Nasty Z28, the numbers are located on the passenger side of the block behind the distributor. A "two-bolt" main, or a four-bolt main. My 1968 Camaro Site. Chevy Small Block V8 Engine Identification. Chevy Chevrolet small block V8 engine casting numbers - WaywardGarage.com - Hot Rods - Musclecars - Project Cars - Farm Trucks . On late-model Chevrolet engines, it is stamped on a ledge at the rear of the engine block on the driver's side, just past the cylinder head. Number Location. Locate the ID number on the engine block. Answer ID 652 | Published 10/06/2001 04:07 PM | Updated 12/18/2018 07:59 AM. A little engine degreaser and a wire ⦠Step 4. The Code. Chevy V8 Small Block casting numbers; Chevy V8 Big Block casting numbers; We are always looking for new castings numbers. Aluminum-block 427 engines (known by Chevrolet enthusiasts as the ZL1) are rare. Block Casting Numbers for Small Block Chevrolet V8. СмоÑÑеÑÑ Chevy engine block and cylinder head casting numbers location СкаÑаÑÑ MP4 360p, MP4 720p. I have checked the book Catalog of Chevy Truck ID numbers 1946 - 1972 but I haven't been able to identify the engines' years of production. The date code will usually be found in the same area, sometimes on the opposite side from the casting number, but not always. Open-chamber designs are larger and provide lower compression ⦠The Casting Numbers to the right are found just below and to the right of the Distributor on the passenger side. The Chevy small block 327-cubic-inch V-8 engine can be identified by its engine code stamping numbers. Another number that is found in the same area is the blockâs casting number, and that can be used to determine the application. Big Block Chevy Casting Numbers Please see the attachment below for a list of cylinder block casting numbers used on Chevy big block engines. View Big Block Engine Casting Codes Chevy Big Block Engine Block Codes (ALL) Casting: Years: CID: Main: Comment: 1401544 : 1975-87 : 454 : truck : ⦠This How to video will show you how to find or locate the casting numbers on your small block chevy engine block.