Hey 48 Chevy,
Both of my 48's have the tank under the bed. The serial number should have the Letter F in the code. FP for the half ton and FR for the 3/4 ton.
Ralph


rtlopez@shipleysystems.com
48 Chevy 3600 w/235
48 Chevy 3100 w/235:
You cant see the smoke on a dirt road.