Hi.i can’t answer your questions about Canadian GMC versus American GMC sheetmetal differences. I would venture a guess there is not a significant difference between the fenders, hood, lower apron, and bumper pan (assuming Canadian GMC’s used GMC sheetmetal and not Chevy front clips) (same manufacturing process using same stamping machines).
It would be best however, that your change to a GMC front crossmember would also include the GMC radiator core support, hood latch assembly, radiator cover, and upper cross brace to be consistent with mounting the GMC radiator and front clip reassembly. Consider the GMC lower radiator hose as well. All of these are found through vendors, EBay, and sources here by posting in the Truck Parts Wanted forum.
Dropping in a 302 is no harder than any other Stovebolt engine swap or upgrade.
I hope this helps... I am not an expert by any means, but this reply should get you started in the right direction, and perhaps prompt a more seasoned veteran here to chime in and either find merit in this posting or not. -Tom
Last edited by tom moore; 06/27/2020 10:14 AM.
