Ok....I did the fuel pressure check and it has plenty, even after 6 hours of sitting. I can hear the fuel pump buzzing fine also. I guess something happens once you put these old girls in gear that causes the idle to struggle against that torque converter load. Lack of vacuum pressure? Air leaks or something that have to be perfectly tight? Leaky valves? Poor compression? I guess it could be anything. But when I go, that thing hauls as good as I think it can. Changed the Air Temp sensor today with a new Bosch part...same issue And, it just seems to be the heat. This morning, it cranked over fine, idled under load and no problems. This afternoon, hot...struggling and stalling!!! Arghh!!!!