"Master cylinders used on drum brakes were usually left unpainted. To dublicate the fresh-cast appearence, paint the assembly cast-iron gray. The cover and hold-down clamp on 1967-1970 models with drum brakes should have a cadmium gold appearence.
On models with disc brakes, the master assembly was usually painted semi-gloss black - both the body and the cover.
Most master cylinders on 1971-1974 models were painted semi-gloss black regardless of the brake type. Master cylinders were finished by the brake vendor, not the Chrysler assembly plant. Thus, there are differences in the finish, so it is possible that some master cylinders used with drum brakes were painted semi-gloss black, or a master cylinderu sed with disc brakes was left unfinished."
..by Paul Herd (I know
c´mon guys... give him a chance
All of us are correct at once in a lifetime.
)