yes, it is possible to put a VTEC head on your SOHC ZC. You can use D16Z6 head from 92~95 Civic or D16Y8 head from 96~00 Civic. If your car is OBD1 use OBD1(D16Z6) head. Same as OBD2 use OBD2 head(D16Y8) because the distributor fitment will be better. Make sure you get complet head, distributor, intake manifold with all sensors,and ECU. Good Luck.