I have a 65 Mustang with 200 Straight Six that I have owned for 25 years. About 5 years ago I started having problems with it stalling when I try and take off from a dead start. This only happens after about 30 mins of driving once the engine is all warmed up. When it is cold, it drives fine. I checked to see if the choke was stuck closed when it was warm but that appears to be open after it is warm. I thought that it might be vapor lock but wasn't sure if that only applied to when the car was turned off for 10-15 mins and restarted. It does stall after it sits for 10-15 mins once it is warm. I had experimented with the Anti-Stall pot on the carb but have not found the sweet spot to eliminate this problem. I adjusted to spec and then tweaked it some to at least keep it from letting me take the car out at all. I tried a new rebuilt carb about 2 years ago but this did not change anything. I also replaced the heat tube from Intake to Carb. Would a fuel pump cause any of this? Can vapor lock occur while the car is running or only if a car has been sitting a few minutes? Any suggestions on things that might be causing the stalling problem? I had a good 20 years without any problems with this car. Frustrated that I can't take it out without stalling at every stop light. Any help is appreciated.