I have a 1968 C-10 pick up truck. I can smell a a ags smell inside truck. I think I may have a small leak somewhere in the tank. It ofcource is inside truck behin seat. I will evevly buy a new tank or somthing. But I was wondering if anyone new of some sort of a sealer I could put on it. Maybe in a spray can because the leak may be up under tank at the floor. Anything like that out there? Also I do have a 1967 truck with a tank in it. I was going to use the tank in it. But caint seen to get it out where the filler tube is in the body. Afried to fourse it, I may damage the tube. So I left it alone. Just will get a new tank from Year One or somewhere. Thanks John.