early a master cylinder swap

Try calling the ram man. He can let you know what you need and hook you up. I bought my manual master cylinder for my 66 Valiant Wagaon that I'm converting to front Kelsey Hayes Disc brakes with a dual reservoir master cyl.

You have to get the proper master cylinder as the drum only master cylinder does not have the fluid capacity to handle disc brakes. The ram man has one that will. He can also hook you up with a proportioning valve for your new system.

7200 Winters St
Fort Worth, TX 76120
Telephone: 817.691.5996

http://www.theramman.com/