yes they're called the same thing in Canada, and no the tail opening has nothing to do with it, the burbs were available either way, and I don't think they were ever refered to as "clamshell", but "tailgate/liftgate", and the barn doors were called panel doors
the panel was actually called a "panel delivery", the same way the car based one was called a "sedan delivery" - after the true panel was replaced with the van body styles some started calling the panels "panel vans", but GM never did
Bill
