[Oldsguy]

I would agree with you that it sure seems like it is fuel starvation. I don't think it would be in the fuel delivery since you only have trouble during one circuit of the carburetor operation (choke). I would look closer at the carb again, has it been rebuilt? I have notoriously bad luck with carbs, have tried to rebuild both Rochesters and Holleys with limited results.....How about the throttle plate bushings, are they worn excessively? Just stabbing the dark now...