I know I have tried to start off my first build too complicated.
I need to get down to basics and realistic goals for my first SBC build and I need to organize a set list, a calculated process to begin my build.

Firstly, just chose a displacement already, as I have a 350 on hand, this will be my choice.

Secondly, my expectations and goals for performance... I honestly believe 1RWHP/CI naturally aspirated, streetably, reliably, and on pump gas should be reasonable and within my capability.

So now that that is established I need the forums help.

The most important thing for me to do would be to identify all the components of my core, and then decide what gets replaced and what stays stock right? Correct my logic here if I'm wrong. 350RWHP on a chevy 350 with an auto 4 speed turbo trans to a 12-bolt posi-trac diff (can't remember gearing) is possible on some of the stock internals while staying within my expectations no?

I need to: Identify the heads. The valve train. The current bore shape and weather it needs to be overbored. The piston types. The rod types. The crank type.

Give me more homework here, I'd really like to get the ball rolling.