Have a stock 69 mustang 428 cj 4 spd.  Runs fine cold. After about 10 minutes of operating temp engine dies out under load . Will stop running. After a minute or 2 will usually start and limp home. So far i have changed fuel pump. Carb 735 holley. Distributor, fuel filters. ,pulled sump from tank replaced screen. Blew gas line out , changed coil ,  kind of at loss now. Anyone have suggestions? Thx