What's the minimum OEM Brake master cylinder / Booster combination for a disk brake upgrade on a 1969 Sport Fury with factory power brakes? Will the stock MC/Booster be enough or will I have to get updated parts?

 

My understanding is that you have to Up-Date both.

 

Thank you kindly.

 

Not to start an argument, but you may want to look into that further. Lots of people on my antique truck forum are running the stock master cylinders and disk brakes up front. You have to deal with the lack or incorrect residual valves and proportioning valves. I put a Toyota master on my 46 Dodge (because it was nearly a bolt in) using a Jeep rear axle with drums and a full disk conversion on the front. I could have left the stock master in and only used the PV2 proportioning valve (it's a combination valve meaning the residuals are in it).
I'm not sure why you would need to change your master or power booster.