CDN M37 markings

[Kirk Armitage]

I'm doing a restoration on a 1952 CDN M37 that was surplused out of PET in 1977, CFR NO: 52-41058. I'm the second owner so it was pretty original ,untouched from when it left Petawawa , I know nothing about markings , there are a few, maybe someone can explain what they are.
Passenger door has 91E in black, none on the left as it has a spare tire carrier.
Rht front bumper yellow with the number 2 3 ? (or 8) in white.
Rht windshield has a Canadian Sport Parachuting Assoc sticker, (can't see the previous owner doing this ) , but who knows.
Possible a canadian flag on the right front lip of the hood and the usual antifreeze check on the top of the rad support.
It's a frame off , pretty much a sandblasting / priming funfest at this stage , it will be original except for a Ford Dorset diesel going in and 12v. Fear not the 251 motor from it has been in one of my Bombardiers for 20 plus years, still going strong ,after a recent overhaul.
Thanks K Armitage