It depends some on what you have, for my '70 I just went to Shucks and bought a rebuilt booster and a brand new Raybestos repoduction master cylinder that even has the tear drop on the end. it's all painted black to be correct anyway so it looks like new stuff , maybe not concours but pretty close. if your year needs gold cad or something to be correct then I could see going to the extra expense of a restotation service.