Stupid gas tank is stupid. Still had fuel coming out of the level sender when cornering. On a lark I tried both the factory and replacement o rings since they fit when nested. That actually seems to have done the trick, no leak on the next test drive.

Next problem was leaking from the AN oil hose to the thermostat. I think I figured out the problem, the hose end is a threaded compression type fitting. The rubber hose showed marks/impression from the previous install -I had removed the hose ends to clean everything after the engine failure. Reinstalled that hose as it had been. I just cut 1/2" off the end and the hose end was a lot harder to thread on. I will leak test tomorrow... and I may have to do the same thing to the hose ends that supply/return to the filter block. Not thrilled about that...