Im not sure of the 80's but 1979 booster should be gold cadmium plated. May be the same for 1980. I think the '81 used a different style altogether. The master cylinder should be painted black. Eastwood used to sell a gold cad plating type paint that was close, I just painted my wiper motor which I think was originally the same as the booster. I lightly dusted gold over the bare silver, it turned out ok, not as close as my booster but good enough I think.