so with this dual system setup, fuel can be transferred from one tank to the other. Well the back tank is leaking tried once to redo the lines, but that failed. so i just want to run off the front tank, i don't go on long hauls and i don't see me owning this truck for very long(would love to keep but the truck was not kept up and can't afford to keep replacing everything)

 

Check out Bob G's 38 gallon tank install thread - might be an option if you only want one tank but keep the fuel capacity.

 

I took the rear tank off mine to sand down the frame and the truck runs fine off the front tank. No gas leaking from disconnected rear lines.