Fuel Tank Leaking...any easy fix?

The fuel tank in my 1973 Suburban started leaking a couple days ago, a small drip every 5 or 10 seconds. The car has no rust and I can't see any rust on the tank, it is not smashed or dented. There is a pinched seam that runs down the bottom of the tank, not on the sides like most non-wagon cars. This seam is where it appears to be leaking. Is there any easy in-car fix? Or should I pull the tank, clean it out and see what I got? I have seen the Eastwood fuel tank repair/seal kit...anyone use this before? I think if the seam is letting loose the sealer from inside may be the best bet. Pretty tough to find a fuel tank for a 73 wagon in MN. Thanks for the help!