What PARTS did Hurst and Chrysler put in the Super Stock Barracuda & Dart not in other factory cars

I can see them wanting to run big bolt pattern for several reasons, 1/2” stud versus 7/16” stud, 4 1/2” pattern is much more common for aftermarket wheels and the center indexing ring on the hub is much more common. Remember they also got rid of the left hand threaded studs as well.