by 58 there aren't really any differences -
the gray engine is 235 or standard 283, blu-green is 261 or heavy duty 283 - I've never seen a TF truck valve cover 6 w/ chevrolet embossed in it, but if it's a 283, the embossed covers were car - not sure what you mean about the mirrors - you may have later replacements, and there were different ones [round or rectangle] - the wheel color is the same as US - trim color [off-white/cream] or body color depending on model and paint options
main diff CDN/US is in model numbers - CDN short 1/2T is 1300 series, US is 3100 - go figger - my 57 didn't have the puck, but it had 50,000 miles when I got it, so many games played - my 58, made in the US didn't have a gun in the glove box either!
Bill
