to use the P28 ECU (which is from 92-95 Civic EX) you would need to convert your engine to OBD1 and get a OBD1 to OBD0 jumper harness for the ECU - converting the engine would require an OBD1 distributor, a 4-wire O2 sensor and you really should swap to the OBD1 injectors, although you wouldn't have to - switching to P28 isn't going to give you any horsepower