if you have the complete swap, you shouldnt have to do anything, if you have the ENTIRE VTEC harness its all just plugging in, if you dont have it then youll have to wire up vtec, if the ecu is obd1 you dont need a knock sensor, but if its obd2, then you will need one and need to wire that as well if you dont have the complete harness, you need to look up the ecu pinout and find where the vtec solenoid and oil pressure switch pins are at and wire them up, knock sensor as well if needed, i found the ecu pinout on honda-tech, its 2 wires from the ecu, and then you need to ground them as well.....