Got the pistons and connecting rods out, cracked the case in half, and removed the crank and cam. The engine is pretty much as broken down as far as it can be.
Besides the Otto performance oil pan and rocker covers, and the after-market pistons, I found a set of Clevite 77 main bearings (part# MB 2005 P). Some 'car guy' certainly went all-the-way with this engine sometime in the past.