72 Cuda 383 with drums all around. I currently do not have a master cylinder or proportioning valve. Eventually, I plan to upgrade to power disc brakes in the front, but not at this time. However, I would like to finish off the engine bay with the booster, master and valve now. What would be the correct combination of these items that I can use with my brake pedal setup that will work with the existing drums and then the disc's in the future? I'm looking for part #'s if possible or other vehicle applications that are similar.