I'm using a F**d mustang tank on my 53 3600. Fit is easy if you move the back crossmember. Mine is a flatbed, so I don't have to screw around with putting the fill hose thru bed...... mine will go out the back below flatbed. If you have a regular bed, I've seen 'em mount a fill door in the fender, but that certainly wouldn't look original........... kinda depends on what you want. My main concern was getting the tank out of the cab.
