5.3L into a 69

[GM Muscle]

ok guys im taking the plunge.

my built 355 just isnt cutting it with the gas mileage.

I have a 5.3L and a 700r4 out of my 2002 silverado and im ready to do the swap. i just want to make sure i know what im gettin into and have done a little bit of research. hopefully you guys can help me with anything ive overlooked or forgotten!

heres what i think i need!:
5.3L, non electronic trans and converter
im going carbed so edelbrock carb conversion with msd and 750 speed demon carb
swap headers for 1st gen
motor mound adaptors
oil pan and pickup
im not running ac, so what acc bracketry will work?
my pedal is already setup for a cable
im guessin i will just use some flexible hoses for the radiator?
im sure i will have to find some adapters for my guages.
i have a shift gate for my 700r4

some questions:
bracketry and pulley setup?
driveshaft?
camshaft selection?
any other upgrades that need to be done to the 5.3L?
WHAT ELSE AM I FORGETTING?

i need to get this swap done and i think ive just researched my self to the point of confusion. if anyone can help out id really appreciate it.. i cant afford to have my car down for too long and just want a solid plan before i tackle it..

THANKS in advance,
brantley