67 Dart Resto w/5.7 hemi
When I herd of the predator for the '03, I was going to jump on it right away and then decided to hit different forums to find out that the fact that the '03 has two different computers one for the motor and the other for the tranny they had made a program but it was never finished because they have had difficulty in figuring out how to manage the tranny along with the engine without jeopordizing the marrying of the computer with the car. So at this point they still have not figured it out and according to a little bird out there it wont be done either. So to avoid that it was mentioned to me that the predator was made to be as you said a piggy back but at the same time it can program a hole lot more and it also allows you to go bigger on the cams and horsepower with special programing. So to me it sounds like a win win situation.