The casting code provides the easiest way to identify a Chevy engine block. This code is typically found on the rear of the engine block above the bellhousing flange. This code contains information pertaining to the production location, date and details about model vehicle originally mated to the engine.
All Chevrolet engine blocks are stamped with an engine ID. This code begins with a letter indicating the location where the engine was manufactured followed by a suffix code. Individuals can use ID codes to identify both small and long engine blocks as well as other major components such as crankshafts and engine heads.