3.3 final drive will work I have it in my car however I don't think you will need it if your going to stay under 500whp.

Thanks for all your feedback. I have been trying my best to do all this work, have it done right, and keep the costs down. But it just seems parts for the Z are pretty high, so high I can almost buy another Z. I am really torn with spending over 20K for upgrades over something else (hookers and blow). Or more practically a good condition GTR isn't much of a stretch with a 20K+ down payment and trade in.

A 450 whp Z is a hell of a lot of fun, and I'd argue it looks much, much better than a GTR. Chicks like the Z. Guys like the GTR. Do the math.

If you're having second thoughts about modding the Z, then you're better off leaving it alone.

I almost thought all the work done on the Z was a foolish choice as well because for awhile I was obsessing over a used NSX, but reality set in (e.g., in terms of the dream of building one up and turbocharging this beauty versus funding and life in general). I thought about it hard enough that it would be better to keep the Z. I still love the thrill of manually shifting a turbocharged car.

I am trying to keep the car as long as I can. If I end up selling it, I'll take a break from this hobby for awhile. Nothing else out there really appeals to me without hemorrhaging so much money haha.

Starting at 22k miles since the turbo installation, I just exceeded 57k miles over the weekend. So far it's paying off.