Based on my (2) original RS/Zs, the vacuum tank should be 60% gloss black. The (2) small bolts that attach the RS vacuum switch to the tank (B) should be gold zinc or zinc dichromate plated. I've seen two styles of fasteners that attach the RS tank legs to the inner fender, (A) bolt with integrated washer that is manganese (dark) phosphated (see photo), the other is a Phillips screw that is clear (silver) zinc plated so the finish will depend on the fastener that was used on your car.
