Thinking of ordering a Titan undercarrage replacement tank for my new 3500 C.C. Dually (62 Gal). Has anyone installed one?? I know that it uses the factory sending unit from the stock tank but I was wondering if it comes with a fuel pump and float already in the tank. How about re-calibrating the travel computer to compensate for the larger tank?? What do ya think of "Titan" Vs Transferflow"??