Big Block Chevy(BBC) Engine Suffix Codes The Engine Suffix Code is stamped on a block pad located immediately forward of the right hand or passenger side cylinder head. The entire engine code contains the assembly plant (1 digit), month (2 digits), day (2 digits) and the engine suffix c...
Number Engine Size Year Combustion Chambers 336781 454 1973-1985 Open chamber 346236 454 1975-1978 Open chamber ("peanut" ports) 353049 454 1970-1973 Open chamber 3872702 396 and 427 1966 Closed chamber 3904390 427 1966 Closed chamber 3904390 427 1966 Closed chamber 3909802 396 and 427 1966-...
Chevrolet small-block engine information: Chevy V8 casting numbers, bore and stroke, parts for sale, engine building, Chevy restoration and racers.
Both codes stood for 427ci big-block V8’s. While 9561 translated to L72 option rated at 425 horsepower, 9560 stood for drag strip-prepped ZL-1 powerplant. This all-aluminum 427ci V8 was, like many such engines, seriously underrated at 435 horsepower. In truth, it generated more than 50...
The engine assembly date is a "stamped in" code that is stamped into the metal as opposed to a "raised" casting. These date codes are can be found in a number of locations on the block, but most often are found on a ledge that is visible when the motor is assembled. This ledge ...
The firing order for Chevy Big Block V8 engines (396, 406, 427, 454) is the same as the small blocks: 1-8-4-3-6-5-7-2. The firing order for Chevy LS engines (LS1 to LS7) is different than SB or BB V8 engines. It is 1-8-7-2-6-5-4-3....