I have a 100 gallon stand alone fuel tank that I would like to install where my tool box is now. Have any of you installed your tool box behind the tail gate? If I install the fuel tank behind the cab it won't interfere with the hitch as it is just a few inches higher than the bed rails and it is a long bed 3500 Dodge Dually. I ran into a fellow in Ely, NV who mounted his fuel tank next to the tail gate but he had to lift the hitch over the tank and then lower it to hitch up. My tool box is only as high as the bed rails and I've had this tank sitting around for at least a half dozen years. I suppose Transfer Flow or Northern Tool would be a better solution.
FYI, a friend installed a tank and everything worked well until the electric fuel pump quit. Are you aware that a gas fuel pump is not compatible with diesel? Me neither but I am now.
Stan