you can do it, build it up for nitrous.
ppl dont get that n/a Z's can be fast too.
call up shops and companys and see what parts will work with your setup and etc. find out about the deck clearence and etc. just don some research. 300zxfoums.com and twinturbo.net is a good place to ask questions.
also go to alot of all motor shops that does work on SBC's and fords, etc. the good shops know how to make power out of n/a motors like this.
ive seen close to 450rwhp w/o the bottle on a n/a Z.. its just the right type of parts and TUNING!
best of luck and dont skimp on parts.. buy the best and you will be fine.. skimp and that shit will blow up..

mike