Hot Rods 1964 - 65 falcon ranchero brake booster

The G.F. has decided she wants a Falcon Ranchero. I am gathering information. I know I can use Granada/Monarch spindles and disc brakes. I'm trying to find a power brake booster that will work with the front discs and rear drums. Because the 64-65 Falcons didn't have discs, there is no split master cylinder specific to the model years. I'm hoping someone has already done the leg work and will share the information. Thanks.

 

Have you looked into using a power brake booster and master cylinder from a '64-65 mustang?