From what I remember, the 67 and even early 68 Z/28 did not have the Z/28 emblems on them and they didn't really start promoting the Z/28 until later in 1968. They were looking for promotional funding from Estes. I don't have my books here but found another link with info from a Camaro book. I would have to look it up to check dates. By the way, does anyone know if this convertable Z/28 has AC?
http://www.67z28.com/history.htm