peice of cake to wire in,just go to a scrap yard,find an orion ghia,xr3i with it in (not 90 spec efi xr3i)remove the instrament cluster,follow the wireing loom that comes out the fuel computer and it will go in to the main harness of the car.its connected in by way ov a yellow multi-plug,your car already has this connection.then just trace all the wiring loom from the fuel computer to all the sensors and remove,you also will have a connection under the back, seat looks the same as a spot light connection.should take about an hour to remove and cost about £50