Just a followup: Got my new fuel pump installed, and it runs like a champ. The low, rubbery rumble of my old pump sounded very different from any other fuel pump I've had. My new pump makes a soft, higher pitched whine. I now remember that's what the pump in my '75 Z sounded like. So I guess my pump has been weak for a while now.

I also got the "new" air regulator in -- a used part from a ZX I cleaned up. I now have a high idle upon startup. Yea!

Things are looking up.

sweet. Glad you got it worked out.