Find a garage that will let you put a fuel pressure gauge onto the injection pump. Make sure that you have pressure coming out of it. Your lift pump may have been weak for too long and did some damage to your VP44. Check that and see what you come up with.
Grab a 19m or 3/4" wrench and loosen the first 3 injector lines you can get to.
Get in the truck, and bump the starter. This will cycle the lift pump for 25 seconds. I do it three times to make sure things are nice and full.
Then try to crank the truck, give a little throttle when you do it. It should crank for a bit and then start to sputter and try to start and might even crank up. When it gets to that point, turn the key off, and go tighten the loose injector lines.
Get back in the truck and crank it. It should fire up, but try to keep the RPM's around 1700-2000 to make sure any air that is in the lines doens't kill the engine.'