Just about to swap a 97 ls motor into a 93-95 si hatch. was wondering if I need to do any wire harness changing, Ecu changes, etc. Does the ecu have to be swapped because the engine is Obd2 and the hatch is Obd1? does that matter with smog laws in California? Which harnesses are used from the hatchback and which ones are used from the motor? By the way, the integra is a COMPLETE car, so I have access to any of it's parts. Thanks alot for any help.