I have a set of NOS '67 grills I bought in 1998. The centers are black and the outers are charcoal.
AND the center (larger) horizontal rib which gets covered by the 400 "hockey stick"...
is painted silver.
These sound like '68, not '67.
Sorry to hear they may not be the parts you thought. I will gladly take them off your hands!
1968 400 Coupe, verdoro green, black vinyl top 1968 400 Convertible, verdoro green, black top 1971 Trans Am, cameo white, auto 1970 Buick Skylark Custom Convertible 350-4(driver)