I will be in the market too for an upgrade on my (front) brake system on my '73 Dart.
Currently running stock C-body calipers on '73 C-body rotors (1.25" x 11.75").
Year-round daily usage and winter roadsalt aged the calipers
I like to get rid of some unsprung weight and start by using aluminium calipers w/dust-seals, and maybe lighter rotors too in the future if the price is friendly.
The problem I ran into while checking things out at the time, was that the 4-piston Wilwood caliper has a smaller combined piston-diameter than the current 2.75" ΓΈ factory C-body caliper, which would be a 'step back' and also offset the brake-bias.
Also most calipers, as is the above one, don't fit the 1.25" thick rotors.
