For US, you are correct. But I seem to remember that Environment Canada was four to six years later in adopting many of the US safety and emission standards, but not all of them until much later.I thought that by 1976, all US built cars had to have them. By 1979, that extended to trucks.
Not sure if that applied to Canadian export cars.
Canada to require catalytic converters on U.S. auto imports - UPI Archives
Interesting article from a 1985 Canadian publication seems to infer they were NOT a requirement in 1979, but were a requirement starting in the 1989MY.
That’s a strange article. My understanding is catalytic converters cause acid rain. In fact it wasn’t a thing until most cars on the roads in USA had them. Remember the rotten egg smell? Obviously with computer controlled combustion and fuel injection they got “better”.Canada to require catalytic converters on U.S. auto imports - UPI Archives
Interesting article from a 1985 Canadian publication seems to infer they were NOT a requirement in 1979, but were a requirement starting in the 1989MY.
Here's what I have for 1979 Chrysler 300 with dual exhaust:For the 1979 model year, were cats required on new cars sold in Canada?