Will the Holley system interface with data acquisition systems like Smart Wire/Racepak, Stack, Auto meter dash displays? Thanks.

As I understand, the interface between the Racepak dash is in the works. Not sure about the others. You may also utilize their Touch Screen display as well.

Not all functions in the ECU's will map to the racepak G2XPro. Specifically the lbs/hr of fuel consumption would not come across..
You should check exactly what can be read between systems before buying anything.
Ron

Thanks Ron, seems the Dominator will be first up to interface with Racepak. That is what's in the pipe line for now. I'll make a template and see how the Holley touch screen looks.