65 Dodge Dart GT Manual to Power Brake conversion

I bought a 65 Dart /6 225, and I am installing a built 273 (250 H.P.) in the car. The car will have a 904 transmission with a 3.23 7-1/4 Sure Grip. The slant had 9 inch drum brakes on all corners, and, wanting to stay original, I will be installing 10 inch drums on front ant back. I know I have been told to install disc on the front, but I am not making that change. My question is as follows. I m using a Power Brake booster from a 65 Valiant with the reserve canister. Should I use a dual Master Cylinder or stay with the single as was on the Valiant? New on the brake conversion, so any advise is appreciated. Thanks. Old Dart 66