Well, I buttoned her all up yesterday. I got the tank repaired and replaced ALL the fuel rubber at the rear. New filter, vapor valve, lines, clamps, fuel sender (from a few months prior) and some Permatex Avaiation sealer for the bottom fitting and ..... no leaks, not even the slightest whiff of gas.
For those who may not know, the tank has a peculiar shape. It has a bottom 'step' where the fitting goes, and the corrosion in the tank was there. That's what was replaced. It may have sat for long periods of time with moisture in the tank. The good part is that all the corrosion was confined to that small area. If you smell a bit of gas, take the rear bulkhead cover off and look at the bottom. And for whats its worth, the fuel lines were all cracked and brittle. I highly recommend replacing the fuel filter and the rubber while you're down there. Just because the braided lines look ok, they may be hard as rocks and crack easily. BTW, my AK is a 1988.
So far, so good.