i was wondering if it is possible to use the wiring harness and ECU from a s4 turbo2 and apply it to a s5 motor, are ther any modifications required? Right now i have an 87' GXL and a s5 turbo motor sitting at home, i can easily come by an s4 ecu and harness so i need to know if it will work with my set-up. if anybody has done this swap before i would really appreciate any advice. thanks