The brakes on a 1951-55 Kaiser were considered oversize for the power/performance, etc of the standard Kaisers. Component parts are easy to find...master cylinder is a 1949-51 Ford and wheel cylinder repair kits abound. I drove my 1952 Kaiser deluxe sedan from Wisconsin to southern KY when Barbara and I moved there several years ago, and never had any kind of stopping condition that would require disc brakes. We are now in the Cleveland OH area and will probably be here until we retire, maybe even after that.
Besides the Shop Manual you should also have the illustrated parts list, as a lot of parts vendors (and people selling parts at swap meets and club meets) tend to go by part number rather than description and vehicle type.
Jack Mueller
Club Historian