After driving for about 20-30 minutes, my truck decides to shut off. It
loses power, bogs down, and then shuts off completely. When I try to
restart it, it's as if the battery is dead. It will try to turn over a few
times and then dies. If I wait for about 30 minutes it will start right up
like nothing is wrong until about another 20 minutes passes and it does it
again. The truck is not over heating and isn't low on any fluids. It has
the 2.9 v-6 and has about 165,000 miles on it. PLEASE HELP ME!!!! TIA.

I ran into that same problem a few years back with a '94 Ranger. My
mechanic replaced all kinds of sensors and the ignition module but it
kept cutting off, usually at the worst possible time.
I finally had to take it to a REAL specialist who found the problem to
be nothing more than a bad ground. Once the engine reached operating
temperature, metal would expand and break the circuit.
Look for a bad ground connection. HTH

Uncle Joe