Interesting.. Ok, I'll move the line to the actual bullet connector on the trailing coil instead of hijacking the line feeding the stock guage.

Kinda sorta fixed the idle problem. Removing the thermowax and fast idle cam left the primary throttle plates fully shut. Compared TBs with a junkyard one (complete with thermowax and plates), and the bottom plate still had a significant gap in it, even with the thermo fully disengaged. I bumped the throttle stop up, and now it idles at 1500. Hunts at that RPM though, still suspect a vacuum leak. It's on the trailer to head over to the alignment shop, but this weekend I'll have time to dig into it.

PaulC