F-150 power loss at warm engine

hi, everyone , I'm new here, just recovering from a heartattack, I have a question, I have replaced plugs, distributer,and fuel filter, on my f-150 ,it runs fine cold, but when warn, it loses power , it feels like it is not getting fuel, has power loss, it is an 84 f-150 electronic ignition, mech fuel pump. 300 inline six, any suguestions?