i think the best you could do with what you have is this.lightend fly
wheel and crank(gives you faster revving). full roller valve train and righ rpm cam(gives you higher rev limit). gear drive for cam(will give you a mechanical whine). it wont sound like a real 328 but would give you a more exotic sound and fool tha average person
i decided not to touch the engine just do some exterior and interior stuff.
That is a very wise decision. I think you will love that decision in the future.
ya man im listening to what you said. just have to do the interior, rims, horn, and change the emblems in the back, and a deck lid spoiler.