Aftermarket brakes for a 70 Dart?
When I need serious calipers, I found the Toyota 4 x 2 inch puck calipers for $70.00 to work exceptionally well in competition, The Mazda finned aluminum calipers are getting hard to find but very nice as well, but smaller pucks .
https://www.rockauto.com/en/catalog....4l+l4,1277782,brake+&+wheel+hub,caliper,1704Raybestos # 10087n, 10088
No decal !
Fab or modify mount brkts .
Cheers