Hi, My Firebird has a VIN which says it should be a 1968 convertible, but it looks very much like a 1967 model (with vent windows and non-wrap-around lights in front). Has anyone heard about this before? Could it be a late year 1967 car, tagged as 1968 but build with 1967 specs? I don't have the other tag information yet since the car is being shipped to me at the moment.