Nope they were built both ways in both countries. Another cool fact is the New York Crown Vic taxi in the late 90`s and on was only built in Canada and the back door was 6 inches longer.
Sitting in shop tuning up my model A coupe and checked yup all screws and machine screws have Robertson heads on them. Spark plugs are two piece. So this car was built in Canada besides that the the plate on the fire wall says made in Canada LOL