I agree with Bartamos. Disks are a huge improvement. I haven't heard of anyone "upgrading" their factory disks to drums! A BIG problem with drum breaks is getting the shoes arked to the same curvature as the drums. If the drums are turned and the new shoes don't make full contact then you'll have awful brake performance. Happily that isn't a problem with disks. Brake shops used to have the machine to grind the proper ark on the new shoes but good luck finding those machines now as they produce asbestos dust.
I disagree that running the stock master cylinder would work in a satisfactory manner. You need a m/c made for disk /drum applications. As for the need for a boosted m/c,
I am running a non boosted master cylinder on my disk /drums and the pedal feel is nice.
David
