Hi All. I have a Mitsubishi FD70 that has hard pedal but will not stop. The rear was rebuilt and all new brake parts installed inside drum. I replaced the booster. I have about 30 inches of vacuum coming from pump to booster. It makes no difference if I apply brakes or use inch control. The pedal will depress about 3 inches and then get hard. Shoes have been adjusted without axles to make sure I get a good adjustment. Also when it finally does stop (while standing on pedal) it makes a loud grinding noise. Steel lines are not kinked. I assume the M/C is ok because it does apply pressure to shoes as witnessed when brake pedal depressed with drum off of unit. Any help would be appreciated. My next step is replace M/C then I am lost. Help thanks Ed