I am running a big stuff 3 stand alone ecu in my 2002 corvette and the factory ecu to control the dash functions. I am in the middle of stripping down the factory harness to run the minimum amount of inputs into the factory controller to operate the dash. My thoughts are that i only need to run the crank rpm, water temp, oil pressure, oil temp and spedo signals into the factory ecu, and shut off the pids for mass air, ETC , cam sync, injectors, coils, emissions controls. any help or insight would be appreciated