hello mate you need pin out data for both ecu's yours and the 3s, if you undo the 4 screws on top of the ecu it should be on there. when i done my conversion i used the 3s engine loom as most of the wires go from the engine to the ecu, also i kept the original alternator wiring/reverse switch and speed sensor wiring, im sure dawsey will be along soon he has done a few 3s conversion and knows loads more then me about them