'67 Dart Brake Booster?

What will fit into a '67 Dart Gt for a power brake booster? Right now I have the big k-frame in the car with the big disc brakes and in the rear I am running a narrowed 9 inch that has disc brakes on it as well. What would be the best booster for this set-up and what kind of brkae proportioning valve should I run? Will a simple Wilwood brake bias control work? Thank You!!!