So bottom line...all b-series clutch kits and flywheels are interchangeable.

If you're trying to decide between going LS-VTEC or swapping in a GSR or ITR engine (since you said you'd want to stay NA) an, search around the forum for LS-VTEC-related posts to get an idea of what kinds of numbers people are running with those setups and to see what's involved in doing the head swap. Also, look for shops in the area that can do any work you're not willing/able to do yourself, and see what they have to offer/say.

Welcome, and good luck!