could i not modify the wiring in the car already? or is a different system?
(tying to make this easier)
4 pot to six pot, well there's a 1/3rd of the loom missing already, all the sensors are in different places and it's got the wrong ECU, If you got hod of a 147 GTA loom, ECU, code box and lock set then it would be an easy build, if you didn't then you'd have to bypass the immobiliser system / cut it out or reprogramme the ECU. the only other tricky part is finding the exhaust for a reasonable price.