He'll still need the wheel spacers for the wheels to clear the brakes. Need at least 17" wheels to clear the Cobra brakes. I tried a 16 wheel before and it rubbed. I think the calipers could be ground to clear 16" wheels if needed but dont hold me to that. Most just use a 1/2" wheel spacer up front. With a QA1 that might put them into the fender on a Fox. QA1 and UPR sell adjustible lower a-arms that work great.
This was the set up on mine.
Hurst