Driveshaft ordered. Called a local shop and they quoted me the same amount (after shipping) but would be re-using my old yoke. Driveshaft Specialists of Texas would be all new parts. Went with the 5" aluminum.
New transmission pan, gasket, filter installed. Note to anyone using an aftermarket deep pan with the 'bump' in the corner, you need the ACDelco 24208576 filter, NOT the ACDelco TF337 that a parts lookup will give you. That filter does not have the corner shape to work with the pan.
New Russel 640520 -6AN to 1/4 NPSM fittings in the transmission, with 90 degree -6AN fittings with braided PTFE hose. In retrospect, 45 degree would probably fit better, but it's what I had.
Russel 640330 -6AN to 1/2x20 inverted flare fittings in the radiator for the hoses. I ran the top (return) hose intentionally longer than it needs to be since I want to add an auxiliary cooler at some point and want to make sure it can fit around the front of the AC condensor.
Ended up picking up some Evil Energy branded PTFE hose and fittings off amazon since I ran out of the Hot Rod Fuel Hose stuff. Seems to be equal quality for a little less money.
Also pictured is the 5/8 to 5/16 adapter I mentioned in my last post. No clamps on it yet, just mocking up the steam port line.