Truck stalls and will no crank back till it cools down

What is your question?

I've replaced crank shaft sensor, all the relays, replaced the coil, and replaced the thermostat sensor along with all the cooling system. Why does it still die after driving it for a while and won't start back up till you let it cool completely down?

What makes this problem better or worse?

Hot days seem to make it more of a problem

How long has your 1995 Dodge Ram 1500 had this problem?

Months