Master Cylinder Question

This is easy. I used the stock "equal" drum brake master on my 67, with FOUR wheel disc. I simply punched a nail through the residual valves. I could have tried to take the seats out the way the book shows, but may have damaged them. Equal master is fine YOU SIMPLY NEED to check the brake fluid once in awhile. the larger section is not for "daily operation," it is rather for pad wear, as the disc side "uses" fluid more than the shoe side.