1989 Ford F 150 Ve 89 F 150 302ci 5speed Replaced Plugs Wires Distributor

i've an 89' F-150/302ci/5speed. have replaced plugs, wires, distributor, ignition module among other parts. it'll crank and run as good as one could ask, once getting on up to temp it'll miss, backfire and die. i've chased fuel and fire, i'm leaning on fire however. no sign when it's coming, no "check engine" light? any ideas??