When all this first started happening, I bought a "spark checker" to be sure (it was cheaper than the fuel pressure gauge). And I did indeed have spark after it died.

Then after testing with the fuel pressure gauge, My pressure would drop to 0, as the engine was dieing. I've not retested the fuel pressure or spark since the initial test, and will do that this evening.

Even though I am frustrated with this truck, I do appreciate all the help and advice you guys are giving me, and I hope I'm not coming off as rude in anyway. If so, it is unintentional.