you talking about a engine wiring harness??? or in-dash to ecu harness? if you have MPFI than installing a b16a1 is pretty much plug and play...however if you are going for a 92+ B16 then you are going to need and obd0-obd1 conversion harness...that is of course if you were planning on running the b16 stock ecu.

let me know and i can show you where to get one.