If you use cork use the impregnated cork material. Did one like that, Sealed to sending unit with Permatex aircraft sealer with nothing to the tank.so I can pull it on and off tank when needed. Works well.
You could use HighTack to the tank, it would be removable.
Pure cork will leak.
Don’t use silicone gasket maker, it’s not appropriate for Gas.
Used some “Permatex Fuel Tank Repair 84334”. Its an epoxy stick. Cut some off, mix, press into place. Let it cure. Looks a bit like chewing gum under a table.
Working well at this point.
The leak was a very small hole on an old crease from bottoming out at some point in the distant past.
The interior of the tank is rust free. There is an old patch in what looks like JB Weld at the other end of the crease that is leak free.
I heard but have not confirmed that Corvair are the same foam and upholstery cut pattern. Not style of course.
Seats probably don’t mount the same though.
