Has anyone added a Aux Gas Tank (for Gasoline) to their Titan? I am looking at a tank from Northern Tools (51 gal) to my 2006 Titan 4x4 Crew Cab. I am pulling a 27' camper and I am looking to extend my travel distance. Most tanks are designed and sold for deisel. The one I am looking at will do gas, but I am having trouble finding a pump kit for the Titan. Any help out there?