As mentioned, could be a valve cover or the distributor because it looks pretty dry under there.
I ended up cutting the nibs off my pan gasket to get it to center in the valley on the rear main cap. Otherwise the seal rode on the lip of the valley on the cap because the pan slots were stamped too close to the outside. It dropped off the center nib during the tip test for me.
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Ken
'68 GTO - Ram Air II 464 - 236/242 roller - 9.5” TSP converter - Moser 3.55 Truetrac ( build thread | walk around)
'95 Comp T/A #6 M6 - bone stock ( pics)
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