1968 gts seatbelts

Do the belts have tags on them? My '67 still has the tags sewn on with p/n and date.
Another clue might be the belt retainers which were color molded but I'm not sure what year that began after 67.

Early 68 shoulder belts might have been different too.
The 1970 Hamtramck Registry - 1968 Chrysler Parts Accessories Catalog (Page 1)