Got the alternator warrantied and installed, it works again... Gotta say the swap process at Napa wasn't bad, no receipt, handed them an alternator, they handed me a new one, I signed a receipt and went on my way...
The stupid Explorer had to be jump started this morning, of course it was like 25F outside, drug the '90 over to jump it (would have drove it but don't remember how much air is in the tires or how much oil is in it...). Turns out the tires on the spoloder don't have much air in them either but there isn't much rubber either so I don't really care... After fixing the O2 sensor wires it runs MUCH better, transmission shifts like it should now too with voltage getting to the solenoids...