1986 Ford F-250 no start. Ran just two hours ago.

I just finished breathing life into an F250 that had sat for four years. It ran when it was parked. I reaplaced the old tank and fuel pump. Cleaned the fuel divertor valve and replaced the in-line filter. I cleaned all the old gas out of the lines and it cranked right off. I drove it about a mile, emptied the contents of the bed and I was driving out of the driveway, it sputtered out and died. I put about a gallon of fresh gas in the tank before driving it.

Now I have a no-start condition. I checked fuel pressure at the fuel rail (roughly 50psi). Checked for spark; adaquite spark. A friend suggested either. It ran for a couple seconds, sputtered and died.

So, here's what I know, it should run, but the fuel isn't getting past the injectors into the cylinders.

Any thoughts?