i bought a tank from Tank's Inc. It was a universal tank #USPT-GH and I used a pop up filler that I installed in the drivers rear fender as I didn't want a filler to be in the center of the wood bed. Didn't think it wouid be a great idea to have fuel spill on the wood bed and ruin the finish. I have attached several pictures (I hope) show in installation and the routing for the filler tubes and hoses. My truck is a 52 3100