Since the first few attempts didn't solve the problems and I had a new MC-2150 sitting in the garage, I decided to throw that on and see what the effect was. The jeep now starts up on half a crank and there is no hesitation at all. But it idles way too well... anywhere from 1200-2000 RPM and I can't get it down.

I searched for other threads on adjusting the idle, but my problem seems to be different than what I found. The idle mixture screws are less than 1 turn out from seated, and the curb idle screw isn't even touching the throttle arm, but the thing won't slow down. If I attempt to manually close the throttle, the idle slows down, but there is really no room to move it. The accelerator cable is loose enough that it is not holding it open. I rechecked the timing and withouut the vacuum advance on it seems to idle correctly (750-800). Thoughts?

Thanks again for all of the help!