Power to manual brakes

Why would you want to lose the power brakes
I have been unable to get the power brakes working correctly. I have sent the booster to booster Dewey twice for a rebuild, but the brakes drag, low pedal and the rebuilt cast iron master cyl. Leaks. It is my last resort to get decent brakes on the car. I would prefer to keep it all stock since the car is an unrestored 33,000 mile car, but I have been fighting this brake issue for a long time, and have tried everything I can think of to make the power brakes work, with no luck. I do prefer the feel of manual over power brakes though.