4 wheel power disc master cylinder

looking for a master cylinder specifically made for 4 wheel power discs.

Id bought master power disc brake conversion kit for front discs, and im running jeep cherokee rear discs, i didnt realize at the time there were different master cyliinders for disc/drum vs disc/disc application, an oversight on my part, too late to return it so now i need the correct one that doesnt have the pressure valve thing for the rear drums. Online descriptions seem vague at best. Dont wanna make the same mistake twice, so links would be super helpful