sounds like you pretty much have it covered...i used a fuel pump for a 96 vortec V8, Ep381 I believe when I did my swap.. knock on wood I have ran the truck for 5 years with no issues from the factory fuel lines
Hats off to you for doing the suprise swap for your father... I did a swap on my dad's 96 truck this summer... his ole 5.7 was tired and worn out.. he's been all smiles since I put a 4.8 into it