Brake questions

drum brakes are what they call self-energizing in that when the shoes contact the drum, the spinning motion of the drum tends to decrease the pedal effort required as the car slows down.
Disc brakes do not have this type of behavior. So they often have a booster to compensate for the extra leg-power required.
The power-assist does make it a lil easier to modulate the brake application.
Light-weight A-bodies can get away without a booster, however
personally, I like a small diameter MC with a booster for it's excellent road manners.