usa vs. canada

Could someone tell me the difference from US built and Canadian built cars. It seems my 71 dodge dart swinger was built up north in Canada. I was tell a friend about my rear end and was explaining that I have a 8.75 rear end but it has a 4 inch bolt pattern and I was under the impression that it should have the 4.5 bolt pattern. He asked me if it was built in canada and I told him that it was, I had read that when I checked my vin# when I got the car. He told me that other things would be different too. Does anyone know what other differences I might run across or why? Why would there be any difference in the rear end? it is a 741, 8.75 I know it's the smaller of the 3 different 8.75 rears. thanks
Author: admin