Jayce,
A good example of mix and match can be seen on my bike at:
http://www.a7a10.net/forum/index.php?topic=166.0 I suppose this is what Beezageezauk was thinking when he said it would open a can of worms. I am rather certain that my fork legs are original '55, while the mudguard is of a later model A10 or, maybe, A50/65. As you will see, the fork legs have the fender mounting tabs on the trailing side. The mudguard, however, is of the type that uses yokes bolted to holes on the insides of the fork legs. My fork legs have no such holes. For me, contrary to Beezageezauk, this was not a waste of cash, because this is how I bought the motorcycle in 1973 for US $50. It was not until well into the 2003-started rebuild, and after considerable body work to the mudguard, that I realized the differences. In looking at this you will see that I have vertical stays leading and trailing the forks, with the forward ones connecting where angled stays, from near the nose of the mudguard, would be correct for the model year. In the rebuild, I changed from flat-stock stays to round-stock, making the short trailing ones myself.
Recognizing that my front mudguard and stays are just a couple of the things that keep my bike from being original, I don't worry about it too much. In fact, I kinda like the girderish look it gives the front end, something Indian Larry might have call the "mechanicalness" of it all.
Richard