IDK, man. It seems that z24i TB parts are pricey. If it were me, I'd swap a weber carb on that bish, and it would be killin', but since you live in sunny California, IDK if a weber carb would be legal. You could become a member of
http://www.infamousnissan.com, they have alot of z24i's floating around there. Really, they just float around all weightless and s***. Good luck, you're gonna need it.