"All 1965-66 fans and pulleys were painted semi-gloss black, the fan was dipped & the pulley was spray painted. For a period beginning sometime in early 67 thru 1969 the pulleys was plated zinc dichromate (gold color) instead of painted. By late 1970 again the pulley was painted. Most single pulleys were completely painted semi-flat black while double pulleys and some single pulleys were painted on the front side over the ZDC plating. 1967 and up fans are ZDC plated as the pulley."
My car is a 66, so I dipped the fan and sprayed the pulley.