1984 Ford Bronco engine won't restart when brought up to te

Engine Performance problem
1984 Ford Bronco V8 Four Wheel Drive Automatic

I have been having problems off and on for almost 6 months, narrowed down the main problem and now I have a new one. On a cold start, engine starts, runs great, once the engine gets up to temperature the truck won't restart. I have recently replaced the coil, distributor, voltage regulator, selenoid, map sensor, fule pump, radiator, thermostat and gasket, wires, plugs, fuel tank and many other parts. Once the motor cools down, the truck starts up fine.

The truck has no cold idle.

The truck has no muffler on it, just the converter, straight pipe to the tail end, could that be contributing to this recent problem?

I had written to you once before within the past 3 months, and your suggestion was exactly what the problem was, so I am hoping you will have the same insight this time around.

Frustated and pooor! From dumping so much time, energy and money into this truck and yet. Another probelm!

Thanks,
John