It is a Turbo Action #17675 valve body (Non-brake, forward pattern, LBA). The car is still in the air on jackstands. What I'm describing is from watching the rear wheels in the air. With engine running; 1st: no go / locked up against the converter. Everything else seems correct. With engine OFF, wheels WILL move in 1st (as well as 2nd and D). So in my mind, that eliminates the Park rod issue, correct? And means that it IS something hydraulic, correct?

Also, just to confirm: I did check the shift lever in each gear against the shifter. It IS properly getting into each gear position.

My luck..... Paul is out of the office all day today. Won't be able to get ahold of him until tomorrow.