1.6, shit man put the z6 head on the y8 block and then get a p28 ecu and run obd1. But if you want to stay obd0 get a 88-91 si ecu and then get a msd rpm activator for the vtec and you'll be straight. And for the wireing the block has nothing to do with wireing, its just up to you if you want to stay obd0 or go up to obd1.