Gate-Way & CompAuto Custom harness- This Is a custom harness built In House that alows you to run a holley EFI Dominato or Terminator Max  and still keep the use of your factory Gauges,  ABS, Power Steering. 2011-14 GT, Boss and in house only GT500!
This is the exact setup we run in Hendersons 2013 Boss!  Videos Atached.
This Is a build to order item.  
It is available right a way with the short harness for around $1800.00