I just did the whole works.
Forget the carb. You won't be moving forward.
I used a 2004 5.3 and 4L60e tranny. This is drive by wire, (love it), amazingly, no throttle lag.
No AFM on this year engine.
Requires in tank fuel pump.
Oil pan and header kit req'd for your car if you don't want to notch your cross member like I did.
Ask specific questions and I'll do what I can to help.