Today Dad removed the original 4 governor studs and replaced with longer versions from Lycoming. The original studs didn’t have sufficient length for the two washers that are called out in the manual.
A stud removal tool, some copper paste, and a couple of nuts were needed to remove the old studs and install the new ones. Carefully measuring the depth of the original studs helped ensure the right placement of the new ones.
With the studs in, I reinstalled the governor and final torqued the nuts.