The headlight surrounds are all specific to each model year. The 1967's and 1968's model years are the MOST similar with the 1969's being much more unique.
the 1967 and 1968 Headlight bezels actually look VERY much the same however the 68's have an additional attachment screw hole. Please see the attached picture for the location detail.
The 1969 Model year Headlight bezel is plastic and is separate from the surround. The surrounds on the 1969 are a single piece whereas the previous two years the bezels were all metal and riveted to the corner surrounds.