Stock 81 zx's had no carbs, they were fuel injected. If you have carbs you have some crazy aftermarket setup that will drive a beginner like you insane and broke. Parts for stock setups are cheap and easy to find, in our own wanted to buy (WTB) classified ads, on e-bay, and at hybridz.org. Or, have your existing turbo rebuilt, just google "turbocharger rebuilders".
73 240Z very orange
Dual Weber DGV's, header and 2.5 exhaust
Electronic dizzy with G.M. HEI module
Tokico Struts/Springs, Full Poly U bushings
Daily driver, all work done by me