1971 Chevrolet C20 Pickup. 1972 Chevrolet C20 Pickup. 1974 Chevrolet C20 Pickup. 1973 Chevrolet C20 Pickup. Notes: Brake Master Cylinder -- Bore: 1.25 In.; With Power Brakes. Ensure Proper FitTo confirm that this part fits your vehicle, enter your vehicle's Year, Make, Model, Trim and Engine in the Compatibility Table.