dont use any ecu accept stock. u dont have a DOHC cam, so the 89 integra is a bad choice, same with the 90-91 integra ecu. just stick with that ecu, and if u want a more aggresive fuel curve get it chipped to the mods u have in ur car. get a cam, cam gears i/h/e , and get it chipped to that, u will get more power if u chip to ur specs than if u just randomly throw in an ecu.