Also, (although not asked/discussed) manual and power pedals do not interchange.The pedal, hanger and booster from a drum brake car will work just fine for a disc brake car. As Scott says, the master cylinder is different. The distribution block/proportioning valve and the brake lines are also different.
Power drum brake pedals are the same as power disc brake pedals. Power drum brakes had a booster assist, with those front drum brakes.Also, (although not asked/discussed) manual and power pedals do not interchange.