I have read much of this posting. A few questions.
Where is the temperature sensor located?
Which vacuum port are you using for distributor (live or ported)
When checking the dist, did you pull the cap and twist the shaft to make the counterweights move?
Have you verified the vacuum can is functioning?
How old or new is this dist?
Timing and fuel mixture can be super critical for the issues you are having. You brought all this up in another post and then dropped it. Months ago.
