Two questions

[Nima]

I am trying to prioretize my c20 project. Considering that I can work on it only on weekends (not all of them ofcourse) I need to go one step at a time. At this point since I have some problem with carburator, I guess that is the first step. Next is electrical.
Now, first question is; I bought this 4 bbl edlebrock which I want to use it to replace the one I have (2 bbl roche). Is there any benefit to change the air intake too, whithout changing anything else on the engine for now? I believe if I don't change the intake I need to use some kind of adaptor for new carb, is that right?
Second question is for the future; If I want to upgrade the whole electrical system, what type of HEI,Alternator and wiring do you reccomend or you think is more reliable? and how much do you think it will cost?
Thanks for all the info.
First time C20 owner (actually first time truck owner!)