ditch the pullies, even if you're not on a budget.

turbo seems ok. id go with an sc50 or a gt3071R, will be alot more matched to that setup.

upgrade to 740s. for the just in case factor. dont forget good mounts like megan/nismo/jgs rubber...or solids if you're into that.

dont forget the other good basics like correct radiator/fans, water pump, check your timing chain tensioners and guides for wear.

you'll probably have to end up getting cams/springs/retainers (solid lifters would be nice but obviously arent budget), or else you'll probably hit a roadblock about 330whp...not necessarily a roadblock, but cams in SR20 motors exponentially improve the efficiency...aka you can make good power without running stupid high boost.