Good news, it still starts and runs! I had a scare with a small leak from one of the oil pan bolts on the drivers side, right in the middle. Best I can tell is that the gasket was "sqooshed" a bit when I lowered the engine - since I was using a floor jack and a 2x6 right under the pan. I went back and re-torqued the bolts. Found 5 or 6 pan bolts on the driver's side were loose, and the leak stopped after they were tightened. Whew! Rear main seal appears to be leak free also, though I'm still pretty nervous.
Slowly putting everything else back together. Yes vangremlin it's just me, and I'm just in a home garage with jack stands and a floor jack. There is a lot of up and down to get tools, and laying under the car just planning the next step. I really don't want to forget a step and have to take something back out - so I feel like I'm jumping around to random things and not staying on one task.
As an example, it has always been tough to find neutral - and to get to drive I have had to go to first, then back up to Drive. Once the trans was dropped a bit and I could see better, I figured out that the selector lever had come loose on the trans shaft. I was able to get back on tight which is great but it was a detour from the rear main seal job.
So far I've done everything myself. At one point last week my wife said "maybe you should get some professional help". I'm 95% sure she was talking about the car, not a psychiatrist!