Auxillary Fuel Tank

thanks for the replies. The aux tank sits in the bed, top inside of tank has a typical assembly on it with barbed hose fittings with tubes to the tank. The tubes connect to hoses, one to the pump and one to the vacuum side. hoses are fed through the bed into the original fill neck by an adapter with hose connections. So when the switch is flipped the fuel is pumped out of the aux tank into the neck of the fill for the truck. you can fill while driving or whatever. Thanks again and Good Luck & Be Safe ! ! !