Stop over thinking this swap i did it years ago and still driving daily.
2000 5.7 in a 91
Use a edelbrock swap intake and original pump for your truck no problem at all.
If you keep egr then vortec exhaust manifolds or headers for a vortec with egr provisions. Junk the pull brackets and use...
I did a 5.0 to 5.7 vortec swap with a lt1 cam shorty headers police injectors ,under drive pulleys ,dual E-fans with 98 Tahoe y-pipe and twin cherry bombs on the back .
I haven't touched the prom yet bit ten years has passed and it runs like a champ and not bad on gas .
I put a factory 1995 lt1 cam in my vortec
With edelbrock tbi intake and 1998 shorty headers so could retain the egr .
It runs pretty good until i put 35" tires on