1975 Corvette engines have the last six digits of the VIN stamped on the block just ahead of the cylinder head on the right-hand side combined with a three-letter engine code suffix . Also cast into the top rear of the block is a four-symbol code indicating when the engine was built for example B 23 5 which is for February 23, 1975.
Position Description - Month the block was cast
2-3 Two digit date the engine was built.
4 Single digit year. i.e. 5=1975
Position Character Description
1 to 7 0001001 Sequential Production Number F or T Flint, MI or Tonawanda, NY
Carburetion & Transmission Code - Engine CompressionTransmission Carburetor
CUB 350-cid 165-hp V-8 8.5:1 Manual Four-Barrel
CUD 350-cid 205-hp V-8 9.0:1 Manual Four-Barrel
CRK 350-cid V-8 THM-400 automatic Four-Barrel
CRL 350-cid V-8 Manual Four-Barrel
CRM 350-cid V-8 THM-400 automatic Four-Barrel
CUT 350-cid V-8 Manual Four-Barrel
CUA 350-cid V-8 Manual Four-Barrel
The body number plate is located on the engine side of the cowl. The Fisher Body Style Number identifies the model of Corvette.
75-1YZ67 - Corvette Sting Ray convertible
75-1YZ37 - Corvette Sting Ray coupe
The body number is the serial number of the body. The trim number represents the color of the interior, the paint color is the exterior paint color.