John,
It's simple. Loosen LH mount stud. Slightly raise RH side of the
oil pan. Remove RH mount.
Drill completely through the mount adjacent to the stud.
Install a 7/16" grade 8 bolt, washer and nut. Tghten to compress the the rubber block. Reinstall.
I did both my mounts after delaminating one side (replaced that one with new) at the drag strip.
Forget aluminum, urethane or voodoo chants.