Small Block Chevy Identification Guide

Identifying Small Block Chevy Engines

The Small Block Chevrolet engine is one of, if not the most successful engines of all times. Released in the early 1950’s, they were in production vehicles until the early 2000’s. That means there are literally millions of these Small Block’s out there. Over the course of 50 years there were many different versions made. Some had better heads, more compression, or even more cubic inches. 

Luckily it’s pretty easy to determine exactly what SBC you have under the hood of your ride. There are two sets of numbers that will help determine this. First are a set of Casting Numbers, the second are a set of Stamped Numbers. 

As the names imply, Casting Numbers are cast into the block when it was made. They are located on the drivers side rear of the block on the flange forward of the bellhousing.

These will tell you general information about the engine. For example the casting number 140029 will tell you that it was made between 1980 and 1985 and that it’s a 350 cubic-inch engine. If you want more specific information, you have to look at the Stamped Numbers. 

Stamped Numbers are a set of numbers literally stamped into the block. These numbers are stamped into a machined pad in front of the passenger side cylinder head – more than not it’s covered up by the alternator. These numbers will tell you where the engine was assembled, production date, and the suffix code.

These numbers are often machined off when they deck a block. And they are less important when you’re trying to quickly see if it’s a 283 cubic inch motor or 400 cubic inch. 

If you have any questions on this, hop on SS396.com or give our friendly techs a call at (203) 235-1200

Small Block Chevy Stamping Numbers

The prefix portion of the ID code tells you the engine assembly plant code, and the engine’s assembly date (for example, 0701 = July 1st….no year is indicated). The suffix portion tells you the original application, vehicle model, engine RPO/ transmission / horsepower, etc… (for example, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400).

The engine assembly date must precede the car build date (often by a few days), otherwise something is amiss. Some engine machining operations (decking) will obliterate the engine ID.

Engine ID Code Example: V0101CLJ- (V = Plant, 01 = Month, 01 = Day, CLJ = Engine Suffix Code)
Another example: T0830CTY – (T = Tonawanda, 08 = August, 30 = 30th day, CTY = 1970 396 Camaro, 375 hp, 11.0:1, TH400)

CodeEngine Plant CodeEngine Plant
FFlint (Motor) SSaginaw Service
HHydramatic TTonawanda
KSt. Catherines, Ontario VFlint (Engine)
 (McKinnon Industries Canada)
MGM of Mexico

For a complete list and breakdown of Small Block Chevrolet Suffix Codes, visit Nastyz28.com

Small Block Casting Numbers

Small Block Chevy Casting Numbers

Small block casting date is located on driver side rear of block on flange forward of bellhousing. Big block on the right side of engine above the oil pan rails.

Casting Date Example: E038 – (E = Month, 03 = Day, 8 = Last digit of model year (1978)).

Month: A = Jan, B = Feb, C = Mar, D = Apr, E = May, F = Jun, G = July, H = Aug, I = Sep, J = Oct, K = Nov, L = Dec

 YearsCastingCIDLow PowerHigh PowerMain Caps
1980-851400293502car
1973-803308174001501802car, truck
19753559092621101102car, truck
1976-853559093052A
19753608512622Monza
1976-793619793052car, truck
1978-86366245350car
1982-863662863504Chevrolet, siamese
19823662993504Chevrolet, aluminium
1956-673838102832
1967-683892573022Z-28
1968-733914363072
1965-673932882832car, truck
1976-794607763052car, truck
1976-794607773052car
1978-794607783052car, truck
1979-824715112672car, truck
1976-855816713052A
1985-9414893633502
1979-8221354122672
1979-8224049292672
1973-7630308174002car, truck
1958-6135565192832car, truck
19553703524265195_2car, no filter
1955-5637209912651952252car, truck
195737315482832202832
1956-6737369352832
1957-5937377392832202902car, truck
1958-6237565192831703152car, truck
1956-6737569352832
1962-6537828703272503752car, truck
1956-6737891872832
1962-6737898173272102752car, truck
1961-6237899352831703152Late 61 car & vette
1962-6737907212831702202Chevy II
1964-6737913623272503002Replaced 3790721
1958-6337942262831701952Car & truck
1968-6937944603272502502truck
1968-6938146603272F A
1968-6938146603024Camaro, Z-28
196338309443273002
1956-6738323382832
1964-6638348102831952202Car, truck & marine
1962-6338348122831701952car & truck
1958-6238377392832
1964-6838498522831952202car & truck
1956-6738498592832
1956-6738499352832
1964-6738581743272car, truck
1968-7638559613502car
1964-6738581743272753502Full, A & Y
1964-6738581803272503002
1962-6738581903272
1965-6738621942831952202Chevy II
1962-6638648122832302car, truck
1964-6738686573273002
1962-6738761323272
196338899352832truck
196738926573022902902Z-28, small journal
196738926573272103502car & truck
196738926573502952952Camaro
1968-6938926593272102
196738969442831951952replaced by 307 in 68
196738969482831951952identical to 3834810
196739033523272103502cars only
1969-8039114603502A
1968-7339146353072car
196839146363072002002car & truck
1968-6939146383272
1968-7339146533072A
196839146603272103002cars
196839146783022902902/4Camaro, Z-28
196839146783272103502car & truck
196839146783502952952Camaro/ChevyII
1965-6739322882832A
1956-6739323382832
1974-7539323683502
1969-7339323713072car,truck
1969-7339323733072car,truck
196939323863022902904Camaro Z28
196939323863272102102Camaro
196939323863503003504 
196939323883022902904Z28
196939323883503003004cars
1968-6939331003272
1968-6939331803272
196839411743072truck
1956-6739498522832
1970-8039515094001502652/4car,truck
1970-7339515114002552654B & G body
1962-6739535123272
1968-6939556183274A,F,Vette
196939566183022902904Z28
196939566183272352352fullsize
196939566183502503502/4cars
196939566323072002002car & truck
1969-7639586183502A
1962-6339595123272502
1956-6739595322832
196839700103272A
1969-7939700103501853702 or 4car, truck, Vette
1970-7339700143502003002/4LA built Camaro
1969-7339700203071152002car,truck
1969-7239700243071302002A,F,X
1968-766259425350car,truck
1980-84140102013052car,truck
1980-84140102023052car,truck
1980-84140102033052car, truck
1980-82140102052672
1980-85140102073504truck
1980-85140102093504truck
1978-86140102313052
1979-82140102802672car
1982140110643504Chevrolet, high tin
1979-82140163752672
1979-82140163762672car
1978-8514016379350car, truck
1980-84140163813052car, truck
1978-88140163833052
1979-82140402052672
1978-86140490473052
1986-9414079287350
1987140885263502Camaro
1986-9414088548350
1986-92140885513052
1988-94140936273052
1986-9414093638350
1988-94140947663052
1986-9414101148350
1987-88141020583052
1969-85143163793502

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