If that is the Shelby tag for the car in question that would indicate it was built very late in production and it would be very odd if it used the typically 67 style park light rear housings originally . Yes it was originally delivered to Canada but that is irrelevant to the discussion on the part.
Yes that is the tag for the Shelby in question. Lots of things were changed on it over the years. I am trying to help get it back to correct in some areas. Unfortunately the owner does not care. For example the trunk was painted with spatter paint, not body color, lots of incorrect fasteners, snorkel air cleaner, non Shelby hood springs (chromed along with hinges, & upper hood latch) and the list goes on. The guy who is painting my car is painting the Shelby and anything I can do to help correct it is worth doing imo. I know even less about 1968 Shelby's than I do about 1968 Mustangs