i was thinking about the oil issue today. how long did the engine run upside down? at idle the PCV is pulling a pretty good vacuum and oil should run into the valve cover pretty quickly. the PCV was sucking oil into the manifold and filling it up while it was upside down. thats the only way i can see that much oil getting in there that quickly. theres no way that much oil got past piston rings and through an open valve. luckily it was nose down and ran out the filter. if it had been nose up it would have sat in the manifold until you flipped it back over and then filled the cylinders.

just run the PCV on the valve cover to a breather and cap the port on the TB. then roll it again and see if its any different.