Just pulled out the Transport Canada (DOT) documents on both the cars I bought.
Here, if the car is 15 yrs old or older (except buses) (there are 7 exemptions to this) they are exempt from the Registrar of imported vehicles program and fee.
The fee is $182.00 and you must modify the vehicle to Transport Canada standards within 45 days of import.
The other exemption that might fit is: Vehicles entered for exhibition, demonstration, testing, evaluation or special purposes.
If it is over 25 yrs it is classiffied as antique and you don't pay duty on it
Both countries are usually fairly close in their regulations.
But I'd still call your local Customs office to find out all the info.
If you get someone who says call a broker...ask to speak with someone else.