I am going to go with the kit from classicparts.com you can check it out here. It is a mostly bolt on application with some brake line work near the original MC location, and the addition of a vacuum line from the intake manifold to the booster.
You can check it out here.
http://www.classicparts.com/1947-54-Power-Brake-Booster-Conversion-Drum_Drum/productinfo/71-903/I just replaced all my brake shoes and wheel cylinders and adjusted the shoes using the "tighten until they drag and back them off a few clicks method" and the are spot on now! The pedal feel is great... when the resivior is full. Too bad my MC leaks slowly- Thus the new power MC setup needed.
