Depending on the year and where the car was built, it may not be able to be exported. Challengers for example were built in Canada. I’m not 100% sure on the year, but I do think my 71 will never be leaving Canada due to truedolts new law. They are now considered Canadian history. I’m not dead sure about this being fully in effect, but I heard something about it a while ago.
Here is a little info. It may not pertain to you at all.
Assessment Tool – Exporting Antique Vehicles - Canada.ca