Have you read this? http://cars.homenetcs.co.uk/honda-civic-mb6/modifications-ecu.htm Or Noodles thread, he got a p72 did the necessary soldering etc and mapped with chrome. Yes the p9k ecu is obd2 but the loom, therefore the plugs are obd1. Certainly the lugs need some shaving on the p72, I'm not sure about the p28 or p30, I think they're obd1 so plug straight in. Hopefully someone will confirm. I know H-tune supply p28's in various states of tune but I have heard varying reviews about them.