I was wondering how hard would it be to swap to a OBD 1?

 

Do you have any parts yet? Or do you just want to convert your 91 integra to obd1 ? Now days you can get an obd0-obd1 conversion harness and distributor adapater already done up....,,then get obd1 ecu,obd1/2 distributor,4 wire o2 sensor..