Power to Manual Brake Conversion 73 Duster

Since U R Asking About Brakes , I Have A ??, Had Manual Drum Brakes On 71 Dart,swithed To Disc Brakes, Want To Stay Manual No Power,switched Mc To One Off Dodge Trk[alum Off 86] What Problems Will I Have,havent Changed P-valve Or Installed Newer Mc Yet,still Have Old Mc, What Do I Need For This To Work...thanks