[oldandtired]

Randy...I believe the hole behind the battery box was present in 37-39 pickups. The battery hold down bracket had a downward projection with a hole in the rear for a bolt to pass through. The bolt went through the bracket, passed through the firewall, and the nut and washer were inside the cab. I have been told it was to keep people from being able to steal the battery. If the 39 uses the same battery bolts as the 37 pickup, they are scarce as the Dickens with two different lenghts, neither of which is the same as the passenger car.