Quicky update. The engine is spending the night between the frame rails!
Got the flexplate on and torqued.
Having a heck of a time getting the dowls in the engine block into the bellhousing...and the drivers side mount hole is just a BIT off. Less than 1/8th", but enough that I can't insert the bolt. Need to get that figured out, then lift the engine up and get the headers in there.
I'll give it another couple hours of work tomorrow night.