Don,

Just want to add that I stated the 637 is a gas engine, but they also made a Diesel version. I believe it is a D-637 or possibly a DH-637. Altho they are pretty rare, in trucks anyway.

Let us know what you find out on the Fire Truck.

Do you know what kind of trans it has?

Bill


'60-'72 Chev/GMC Fan
GMC 9500 Fan
Detroit Diesel Fan