You know, I was going to do JUST THAT with my 64 Valiant I got back in January. My friend Evan was helping me.......since I'm older now.......gettin back up and all that......anyway, he gets the tank out and says "hay man come look at this". There was not one spec of rust in that thing. "I JUST KNEW" I was going to replace it. We rinsed it out and slapped er back in. Cleanest original tank I ever saw. Car sat up since 1982. Best we could figure was it had some leaded fuel in it. There was about 1" or so of "something yellow" in the bottom. We assumed it was gas. lol
