I need some advice, I am looing at putting an 04-06 GTO interior in my 69 GTO. I am running a 07 LY6/6L90 trans with a 72mm turbo. THe harness has been converted to stand alone. What would be required for my engine to communicate with the instrument cluster for proper function? I plan on using the dash/harness/HVAC setup and everthing else I may need to make it work I just need some advice. Thanks ahead guys.