Car runs, gets hot, then dies. Cant restart until cooler.

hello all. Brand new to the site. I just picked up a 72 dodge dart with a 440 and 727 auto. Here's a bit of history of the car. Car was sitting for a while and gas was bad. I replaced the gas tank, sending unit, and rebuilt the carb. My issue is the car will start and run to operating temp, then it will die. Then I don't get any spark when I try to restart it. The coil and ECU are very hot (just replaced them) I have searched the other threads on this site and did everything they did. Still no go. I need some assistance.