Moving the tank to the back is a great idea, but the position of the filler cap is the killer. If it's a show/cruiser truck (not actually hauling stuff) then Phat's idea of the brass/stainless boat type filler in the bed looks great, but don't run low when you have something in the back.
For those of us with fleetsides who want to 'use' our trucks hiding the filler seems to be a real problem.
Phat, what about using one of the stake holes in the back corner. Running a line down and over to the tank and then putting a screw on filler cap? Me thinks that would solve the hose in the box problem and still make the filler accessible.
Also, what about a Suzuki Samori or similar little 4x4 tank. Seems they sit between the frame rails on those things. Maybe a bit too narrow.
My 2 cents.
