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

I am not posting any pictures yet. I do not want any pictures to get back to the guy before I try to get them all. I don’t want to ruin anything with him. Not sure why he never shared them before, there must be a reason why he never gave anyone these picture. I have 6 pictures so far, from what he is saying he has a whole book of pictures of these cars at hurst Factory being worked on. Give me some time, I will share them all.
The front brakes you are correct on. I have had a set of these(super cool). Be be honest I don’t now why Chrysle did not get rid of the small bolt after they made these rotors. It would have save them some much money. As far as the rear brakes. The 8 3/4 rear had the big bolt pattern but they had the cheaper smaller 10 x 1 3/4 drums and shoes. I thought they where all 10 x 2 1/2. But pictures do not lie. Maybe on the Dana had the bigger 10 x 2 1/2 brakes. Hopefully he will have picture of them too.

What application was 10 x 1 3/4 rear drums??

some low line /6 B-body? Did 1968 /6 Bodies get 8 3/4’s or did they get 7 1/4’s ?

sorta weird since they were trying to gain rear weight.