Chevelles were built in Canada and in the USA. See
http://www.chevelles.com/ for loads of info.
Pontiac Beaumonts were only built in Canada. It was Pontiac's version of the Chevelle. You could get the SD 396 in the Beaumont. Many parts were the same as the Chevelle.
Look at the 67 Chevelle and Beaumont.
67 SS396 Chevelle
67 Beaumont
Look at all the different years of Beaumonts.
http://www.classiccanadianbeaumonts.com/photobmain.htm