The XR3i is fitted with the ECU '1AFA'. This ecu has all the correct pin locations for the ECU OFAC. With one exception, the AMAL valve. This can be added if you wish, but is generally left out. When using the OFAC ECU on the XR3i loom, you must change the ACT (air charge temperature) sensor located on the inlet runner, and the MAP (manifold absolute pressure) sensor, located on the blower box on in the engine bay. Pin 2 on the E-DIS unit is disconnected on the FRST loom. So cut this, and tape it back into the loom.