Paul - I appreciate the info, however it leaves me rather confused. I saw the engine in the car, it was a 1989 Crown Vic police detective's car, with the heavy duty cooling sysyem and
oil cooler and all that. It once had the bubble gum lights on the roof, among other things, as the holes were patched over, so at one time it was a police cruiser before being painted blue and becomming a detective's car. It had the variable venturi carb which was rather unique looking. If you are correct, the only explanation is that the engine was not a 351. Hopefully, my engine builder is astute enough to recognize that. If he isn't, then you are correct, I need a new builder. The engine is out of the cruiser now and I'll check the block number to see just what it is. Thanks for the help.
Bumpster