Chevrolet C20 Panel 1967 With Power Brakes; With Manual Brakes, Stamped NF. Brake Master Cylinder. Chevrolet C20 Pickup 1967-1970 With Power Brakes; With Manual Brakes, Stamped NF. Chevrolet C20 Suburban 1968-1970 With Power Brakes; With Manual Brakes, Stamped NF.