[rsavage]

Joe,
The first tank is the stock tank. Second is an aftermarket. If you have rust but your stock tank isn't leaking, you could empty it out (I actually use a squeeze pump that I have form a Kero heater with a hose extension on it) by transferring the gas to cans, then dropping it down. ( do not use ANY electrical driven pump - even a drill pump to empty gas and do it outside in a well ventilated area. Once the tank is dropped and empty, pull the sending unit out and clean the inside well with soap and water. After it is dried, You can coat the inside of the tank with an epoxy that is specifically made for coating gas tanks. NAPA has it. You pour a couple of quarts inside, tape off all holes and roll the tank in every direction until all surfaces are coated and it has set. I did this in a 52 Chris Craft gas tank and it worked well. Obviously, the tank has to be solid. If not, buy a replacement. If it were mine, I would get rid of that aftermarket tank. If you don't want to remove it, just eliminate it from the system. Good luck - keep us posted.