Slant Oil Pan Gaskets
If this becomes a straw pole, I vote for pulling the motor.
Get a neighbor to help pull the motor and do the pan gasket right. Working with the four part pan gasket up against that weird rear main and it's little rubber wings... I couldn't imagine doing that on my back and keeping everything clean and lined up.
I found a motor stand on CL for $40 and sniveled an engine hoist from a buddy.
It's easy too to pop the main caps and look for trouble while the motor is upside down. New mains and rod bearings in mine now, just because I could.
Good luck!