I agree with TooMany2Count. I installed a 25 gallon suburban steel tank from J.C. Whitney just behind the rear axle of my '59 Apache Fleetside. It fits between the frame rails. It was pretty easy to run three straps up to bolt to the rails. I didn't have to use an electric fuel pump. The mechanical pump will suck fuel from the rear. It really beats putting bales of hay in the back for traction.