Disc brake conversion

Chard said
Ok thanks it’s a 69 dart custom & 72 cuda disc brake set

What brakes currently are on the '69 Dart?

Also, I assume you know that you're changing from a 5x4" bolt pattern on the Dart to a 5x4.5" bolt pattern on the E-body brakes. Are you converting the rear axle pattern on the Dart as well?