1970 Chevelle tail light lens ?

[SS427]

There are some documented Oshawa built survivor Chevelles with these lenses on them from as late as April. In most cases I would expect a plant to use up their inventory before changing over except in cases like this where it was a safety design defect of sorts. That being said it is possible Canada did not have the same rules and did not have to abide by them so they used up their inventory before changing over.