After a calculated give-up, I put everything back together and fired it up despite not being primed. Oil pressure came up in < 3 seconds. Just got done with the test drive. Have a new non-transmission related noise, but otherwise I think I can call this a success. I can no longer say I've never dropped a transmission, nor can I say I've never opened one up. And I can also say I got it all back together correctly.Still can't prime the oil pump. I have a new Melling pickup tube coming today, if I can't get it primed by the time AutoZone gets it in, I'll drop the pan again, replace the tube, and pack it with petroleum jelly. I really don't want to have to do that.
EDIT: my noise was that the rear driveshaft bolts were extremely loose at the t-case yoke.
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