My 91 civic has a d16z6 head on a d15b2 block. It was like this when i got it. instead of converting to the obd1 they ran the vtec through a msd ignition switch and kept the obdo harness. The only distributor that would work came out of a ls integra it had to be modified to bolt up, looks like garbage. I'm wanting to convert to obd1 or obd2 and put the z6 distibutor back on. I have a d16y8 harness in the garage, i also hve a p28 ecu and a p72 ecu. which ecu would be better to use? and would the y8 harness worked if i piggybacked it to the p28?