Big block chevy identification number

An arrow points to the beginning of the shift an another dot outside the circle indicates what time of day the cast part was made.


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Anyways, that's what that circle thing is if you happen to see it on something. Casting Date 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.

The format consists of divisional identification number, model year, assembly plant designation and vehicle serial or sequence number. In model cars, the serial VIN number of the car the engine was installed in is stamped next to, or under the engine code ID. Starting in , the serial number is stamped either above the oil filter, somewhere on the block pad in front of the cylinder head , or on the transmission flange somewhere.

Parts Identification

Chevrolet issued technical service bulletins to indicate which engines were to recieve a vin stamp, so who knows what could have happend or not happened. A "two-bolt" main, or a four-bolt main.


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Four bolt main blocks are desirable in high performance applications because the extra strength of the additional bolts keeps the bottom end rigid and less prone to failure. However, a properly prepared 2 bolt main engine will work just fine often times you'll lose a rod bolt before you break a crank because it's "only" a 2 bolt main.


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Be Sure to Check with Cheverolet Engine. VI, 7.

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Chevy big block engine serial number decoding - Google Документи

VI, 4. V crate motor, Gen.

Where to find your serial numbers on a small block or big block chevy

VII 8. V, HO V, Race prep, 9.

Chevelle V8 Engine Block Casting Numbers - 1964 through 1972

V, Race prep, BBC Heads Truck", Marine MkIV, T V T, T V, Gen. VI, cc chamber VII,"Vortec ", 8. V, truck crate motor, cc chambers