The CFR (Canadian Forces Registration)
might be painted on some of the parts. In my time, we often had to prepare our vehicles in the spring to be pooled for summer camp. We'd stencil or hand write the CFR on the attractive removeable parts, like canvas tarps and doors. The CFR, or more accurately, a CFR could be inside the hood. However the hood on the '74 Pattern which is what we called the M151A2 is harder to remove than the M38A1. Universal items like spare tires, jerry cans and tools might only have had the abbreviated unit name applied somewhere.
In the situation of the OP, and welcome aboard too, you should go to the state department which registers vehicles and find out what they need to see. For example, my M151A2 has a serial number applied in Alberta and which appears on a metal foil sticker. That number was good enough to register it in Ontario. But, the 1/4 ton trailer was never registered in Quebec where I bought it. So I need to show the bill of sale, identification information and have a notarized affidavit swearing that it is mine before Ontario will give me a plate. I suppose the legal step lets the government charge me with uttering false statements should it be found to have been stolen or something forged.
http://www.ramtank.ca/m151%20mutt.htm