Master Cylinder Choice.

Okay so I have almost everything for the front brake swap for my 66 Valiant but need advice on the master cylinder/ prop valve.
The brakes are a single piston caliper disc setup from a 76 Dart that had power brakes. I'm only wanting manual brakes on the Valiant, so which master cylinder should I get that will work for my setup?
Can I get a dual resevoir cylinder for a manual disc 76 Dart and use that without having to modify the brake plunger rod?
Also, can I get a prop valve from, let's say, a 70's truck with disc front/drum rear and use that?
This is pretty much what I'm down to in this swap and really need to get it figured out, so much help is needed and appreciated!!