ok so i have a 91 civic with 210xxx and i have a d15 obd0 in right now and i wanted to put the d16y7 with a y8 head im confused on what wires to run? i heard y8 was obd2 and the y7 was obd1? so which one do i run? can i use my d15 wiring harness for the swap?or do i have to buy another one? but what i do know is that i need to convert to mpfi i got that much please help!!!!