I guess my servo died
I had another servo that I took apart and hooked it up. I could turn the wheel and see the little servo motor turn so I figure my amp must be OK. I can tap on the servo and it'll start working again, although slowly...
While testing I turned it the heat all the way up and tested for voltage at the auxilliary pump and got nothing. I tested/oiled it and it works fine.
Now if I could find the vacuum leak and get the center vent working. Haven't found anything visually and the lines I hooked up did nothing.
My door locks work sometimes and they feel kind of stiff. The vacuum reservoir doesn't seem like it holds a vacuum very long after the car is turned off. It's gotta be related because how else could my AC keep me from turning the engine off? The brakes feel fine so I don't think it's a vacuum pump issue.
I'm going to look closely at this thing:
http://www.imperialclub.com/Repair/Lit/Master/281/page08.htm