I have a 1965 CJ5 and I am trying to see if a rear mounted fuel tank would fit. I dont have a tank in the jeep yet, however the previous owner had attempted to install something in the back as there are straps there already. The under seat mount idea is out because of custom seats that the PO installed. By measurement the 25.25" wide, and 18" long would be a really tight fit by my measurements. I dont want to order the tank and waste the money if it will not fit. Was hoping for some direction on this. Has anyone done a rear mount on the early cj5's?