The previous owner or a shop used apparently replaced the clutch without using an anti-seize compound and / or over torquing or cross threading both starter bolts, which despite mine and AeroKroil's best efforts promptly wrung into.
I twice attempted to weld nuts to the exposed threads which promptly wrung off as well. The evening was finished off by drilling out the offending bolts with left hand bits, while the whole time was hoping for a grab and extraction. All of this left the holes pretty fockedop.
This morning began with creating a cardboard template of the block face which I will use to fabricate a drill guide for threaded insert installation.
