I used all Mopar parts on my '64 Polara. Spindles and caliper mounts from a 76 Dart. Master cylinder and calipers from a '75 Dart and rotors from a 77 Monaco. Everything just bolts together. Lines were from a '75 dart and just needed a little adjusting to clear and work perfectly.

Spindles were swapped side to side so the calipers could be moved to the rear so they would clear the factory sway bar. Without a sway bar they arr mounted on the front side. No tweaks needed for the brake lines if they're mounted in the stock location. The Monaco rotors are one piece 11.75" and are much stronger than the "A" body rotors.