Two 30Gal. tanks...nice. Do you have any installed pics? Post up some details please about mounting locations for your designs. I was looking into doing the same mod I linked below to keep the tank up and out of the rocks as much as possible. Reading the fuel guage in reverse is no problem, but using a custom filler hose was going to be a pain on the ford tanks. I also like the idea of gaining capacity, but I think one 30gal. tank would be plenty for me.