As a note on the bracket color, on my Jan 68 C code Dearborn unit the bracket appears to have been entirely black originally and did not have any remnants of blue paint on it on either side. The engine had not been previously apart / rebuilt. I see in the photos that some are blue and one is rusty. The black on mine was aged / starting to flake in tiny pieces with rust coming on. It was still attached with the hex head sheet metal screws as seen in the pictures. Were some actually black and some blue? Some painted with the engine, some added after the engine was painted or?