i had an obd1 civic coupe with an obd1 b16a in it and i wrecked that car....now i am putting that engine in a 00 ex shell which is 0bd2, i was told i have to convert my engine to and everything to obd2 but why? cant i just swap in the engine, use the ecu i had in my other car along with the wiring harness and everything else without having to convert it to obd2?

if i do have to convert it to obd2, i heard there was a way to repin or whatever an obd1 dizzy to make it work on an obd2 car.....that possible?