I did my due diligence and JB welded all of the factory plugs Wayne recommends covering.. I hate JB weld by the way, but I suppose in this instance it's recommended? Reminds me of an ex's nair products..
Still trying to get to a point where I feel like the case mating surfaces are clean enough:
I feel like I'm close.
I didn't want to hit it with anything more aggressive than the plastic scraper or plastic sponge, and the ultra-sonic cleaner did 90% of the heavy lifting. Still, there are impressions of the old gaskets and I'm comparing these surfaces to the mirror-like edges in the book. Maybe this is good enough..