you can use the P5M 97+ Ecu you just need to hook up the immobilizer I'm doing this swap in my 94 obd1-> obd2 I reprogramed the immobilizer unit to match my keys and added the learn (red) key to my unit as it didn't come with any keys it starts and runs my f22b motor in the car with the CE light on of course to test the computer and wireing out .. now I just have to get my motor in ...but if you use the P5m you need the keyring from the 97+ lude the immobilizer unit and the ecu + the key from the same car then you can zip tie the key to the ring and your set if not you need a new immobilizer unit as you need 1 learned key and the red learn key for the dealer to be able to add keys to the immobilizer and to write the immobilizer unit code to the ECU unless you know how to hack the honda type 1 immobilizer system ..it took me 2 years to be able to figure out how the system works and to program keys