See Figures 1 through 8
All Corvette engine identification numbers are stamped on a pad of the engine block which is located at the lower front edge of the right side cylinder head. The first letter designates the plant in which the engine was manufactured and the numbers which follow identify the production date. The two or three-letter suffix identifies the engine type and related equipment. On 1972 and later models, if the engine in the vehicle is known to be original, the fifth digit (1972-80) and the eighth digit (1981-82) of the serial number may also identify the engine used in the vehicle.