If your engine isn't a 216 it could have been changed along the lines, but the Canadian GMC's did come with the Chevy 216, I'm sure of that.
I didn't research anything regarding engine numbers, as I had no interest in trying to make the truck original in appearance.
Tailgates are available reproduction both smooth and with stamping, that would be much easier to purchase the smooth tailgate if you want it to be as an original Canadian GMC was.
