Fuel Tank Leaking...any easy fix?

Oh ok. I didn't realize you were talkin about that seam.....I thought maybe you meant on the bottom. There's some stuff O'Reilly's sells called Red Kote. It works GOOD. But you have to flush the tank out REAL good and dry it completely. I always throw some gravel in um and shake um around like a mad man to knock any scale off the inside. then follow the deestruckshuns on the can. You'll probably need at least one quart...maybe two. It coats the whole inside of the tank. That is of course.....if it's not too rusted inside. It's possible it might not be. I've only seen a handful that were that old that looked good. I stuck a screwdriver through the tank on my 63. lol

...and those puttys work WELL......as long as you can find the exact spot it's leakin from. Sometimes that's difficult.