Here's what I've done since I first posted.
Changed plugs and wires, changed oil, added additive to help compression. Compression seems fine, engine is a cold blooded beast, but when warm, idles like a kitten.
Auto trans, 2.3 liter engine, car built in 11/75.
One thing I've noticed is that the secondary barrel does not open till almost WOT. Is this normal? The symptoms are like the engine is not getting enough air. When accelerating, or trying to keep speed, I press down on the accelerator, till I get a "rumble" in the engine. When sitting in the yard, and just ramping it up, it acts like it lags, as if there isn't enough air/fuel getting to the engine to ramp up the RPM's fast enough.
Car has 87,900 original miles on it. very clean. I figure the first owner hardly, if ever, took the car to highway speeds.
Cat is still installed in vehicle, will be gone when I do the exhaust in a couple of months. I think the secondary jet issue could be the culprit, as it seems to be a carburetor issue. Any ideas on where I can find a thread with good pics and instructions to troubleshoot this carb?