I just figured if and when I move my tank to the back of the truck I'd leave the cap and the round fixture it fits into and the robber grommet where they are on the cab simply for the nostalgic look.
I already have a nice looking locking gas cap on there now, leaving the locking cap there would eliminate the problem of any body accidentally using the original opening and putting gas into the cab without a gas tank being there.
No welding.
