Good truck runs good, usually, 6.6l 400 stalls when warm, runs for about 15 minutes, replaced ignition module and coil, starts better than ever but still stalls in about 15 minutes, cleaned the carbon off of the distributor and rotor button, so what now? I believe it is losing spark, it apers to have fuel, after it stalls i can spray eather and still nothing, any help would be awsome. thanks!

 

This is one path you can choose to follow.
If you have a test light available, after the engine stalls and will not restart check the other side of the coil primary (one side of the coil primary is hot all the time even when cranking while the other side of the primary will flash on and off when cranking) to see if it flashes on and off. If it also stays on all the time there is a good possibility the pick-up coil in the distributor is opening up when it gets warm.
If that is the case you will need to replace the pick-up coil.