Fun story, and what a ton of good info.
I'm sure I'm in the minority here but as far as Guild-"ness" this really is not a Guild. If the body and guts were correct (but with the wrong neck), I'd consider that more "original" than this example. I've seen more guitars need broken necks replaced than broken bodies.
While I am a fan of restoration even if it exceeds the true market value of a particular model and I love the work done on the assorted snotless examples here I would just like to say that if it were me I would part out the authentic stuff to someone who may need it for a true restoration of a "real" Guild, in the process get some if not all of my money back.
I supposed that yes, it may be fun to rescue the mutt from the side of the road and give it a good home, but you've merely picked up one of it's limbs. I guess you could say the tail is wagging the dog.