I know this is kind of old thread but I am doing the same thing dropping in a d16y7 to a 93 civic dx hatch and i was wondering a few things that dont match up. first one is that the wire plugs from my d15b7 are too tall to fit in the d16 I was figuring that i needed to get new wires that fit the d16y7 but they would plug into the d15. second like 93TurboD said that there are a couple extra holes on the d15 and don't go anywhere to the d16 i don't know what they are and if i could some how plug them if they only provide vacuum. I'm trying to do this the easiest and cheapest way possible I am not very experienced but i have people who are a lot more experienced than i am so i have help but they don't know about this specific problem. Any help would be appreciated.