I have a 69 coupe with non-power 4 wheel drum brakes. A local person around here (Bay Area) has a power front disc set up from a 68 stang for sale. My question is, will this work with the spindles I have? I want to keep the non power set up. Do I need a different master cylinder than what I already have on my 69? I there a difference between the power-non/ power proportioning valve? Any help would be great, I want to jump on this deal ASAP.