while my gas tank gently seeps

[speedlimit85]

Still leaking! Looks above the petcock. Is it the tank? This sucks.

[speedlimit85]

Or the sending unit?

[speedlimit85]

the sender unit bolts have the same washers as the petcock screws

be working on that when the gasket arrives

[bikerphil]

I've seen a leak on an 80 Standard, it was coming from the seam on the bottom center of the tank underneath the welded on mounting tab. The fix was to use a small amount of internal tank liner only in the rear with the tank tilted upright to let it cure. I hope that isn't the case for you.