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

really , but the early cuda ran the small pattern disc's on the drag cars like 43jr , ect.... ? i know the americans magnesiums as a direct mount had the matl to run the small pattern . we did a pair for the front of my 63 sf from the direct mounts . as you can see lots of matl for that small pattern . 63 sport fury mw on desplay at sears point goodouys april me.jpg DSC09340.JPG