1966 GM A-body Chevelle, GTO, Cutlass, Skylark Brass Single Master Cylinder Distribution Block. This is the distribution block for 66 A-body cars. The block mounts to the frame just below the master cylinder and the single master cylinder line screws into the top while the left and right front lines screw into the sides and the front to rear screws into the back. This block is for the single master cylinder cars that are restored using the original drum brakes. Often these blocks are missing, thrown away, or striped. This is not 1964-65 A-body that block is different, the front to rear brake line went to 1/4" in 1966 so the fitting is larger.
