Hey so i have a 94 hatch with a d16y7 i think it is. its the 1.6 non vtec. but i would like to make it a vtec. since im essentually new to honda i was wondering if i can just swap out the head for a z6 and p28 ecu instead of the whole motor. and wut else i would need to get for it. and the level of difficulty to do so.