Where would the VIN code on the motor be located on a 1989 Chevy Caprice?

GM has been putting "VIN Codes" on their motors since the 60's. The reason for this was security. If a car was stolen and disassembled it would make it easier for law enforcement to identify parts. That's why the vin is also located in several locations on the body as well. The VIN is located on a flat machined surface of the deck surface in front of the passenger side cylinder head. It is stamped into the block, not cast. Now, the casting number of the engine (which gives it no identity with a particular vehicle) is cast into the block on the transmission mounting crown behind the driver side cylinder head. If you are curious about what engine you have, you can just about be certain that your V-8 is a dished piston 305 with 64cc heads with 135HP. A few cars (9C1s and special order cars) had 350s in them which had 260HP and even fewer yet had 305s with flat top pistons and 155HP.