Injectors are new. (see my previous post)

Here's another interesting observation: The idle speed is fluctuating between 730-770rpm. If I disconect the vacuum line to the ignition control unit it drops to 690rpm and does not fluctuate. What does this indicate.

The higher than spec idle speed has made me think I have a vacuum leak. But I've checked and tested all of the lines with a vacuum gauge/pump. I've sprayed the injector seals with carb cleaner and didn't notice any idle change. I still need to test the vacuum at the brake booster. If necessary, I'll take the car to a shop that can do a smoke test to confirm no vacuum leaks.

Any suggestions on futher testing I can do?
~Dave