Yep, 67 has a gasket. You can see it on my friends 67 in these pictures. It is that dark line between the bezel and the fenderThe headlight bezel is the main difference between a 66 and a 67 body. The cutout in the fender is much bigger on a 67.
67s had a gasket? I don't think so.
The '67 headlight seals won't fit properly on a '66.i've wondered the same thing. will a 67 head light bezel gasket work on the 66 head light bezel. mine fit nice an tight to the fender, but i think it would look good an maybe keep from chipping the fender paint. an would have get longer bezel screws to hold it all tight.