Wish I had this guide last night. I had a hell of a time with the bolt under the manifold. I was going to take the oil pressure switch out, but opted not too out of fear of ruining.
As for torquing the bolts down, I stops wrenching when the bolt stopped moving not going beyond that point. Hope that was right.
Also When cleaning the mounting plate I used a razor-blade paint scrapper to get all the crude off wiping down with brake cleaner. Cleaned the housing with brake cleaner and blue shop towels.