Something to be aware that happened with my 512 stroker with ARP studs and Road Race Pan.

Cinching down nuts on the oil pan studs at rear main retainer I felt the torque wrench suddenly loosen as though I had stripped either the nut or the stud that was screwed into the Mancini aluminum retainer.

Pulling the pan off, I found this. The number 5 rear main stud had barely caught the oil pan and what I had felt was the pan that had been caught, suddenly slid a bit as torque was applied thereby given me that quick release that I had felt.

Yes this main stud appeared to be properly bottomed in it block hole (I pulled it out to ensure nothing else was in the hole,,,all was well).

A bit of surgery with a Dremel rounded of a bit of the nut side of the stud and all is well.

To this day not certain if was a stud problem or Road Race pan issue. Only one gasket on pan,,,no windage,,, perhaps this had something to do with it,,,places pan closer to block,,,but doubt it.