I'm having some similar problems-Today, I took the car out, for about 30 minutes-ran fine, around 180-190. Then it started heating up, hitting around 210. Started idling kind of funny at 210. I'm heading out to the parts store, getting a shroud....I'll start checking the vaccuum advance soon.....Gonna check the thermostat, too. Is 210 out of the question? Why the funny idle(kind of slow and Inconsistent, like bub, bub, bub, bu bu bu, bub, bub etc.) As always, Thanks.........