Dual drum MC. Cheap enough to change once you get the disc conversion parts. Just plug rear port of distribution block and extend the rear feed up to the new dual port MC. Single pot MC was just a single sytem, no redundancy when you lose a circuit and I have had it happen in a 63 300, scary!
Thanks to all. Like i commented, I am new on the brake conversion. The advice makes good sense. Single vs. dual. Lose one, and I lose it all. Dual is safer, and go with the front discs. Now, that's the plan. Thanks. Old Dart 66