I had considered this too, but both the pocket on the body and the heel of the neck are to fender spec in terms of width. My other tele is a Fender Classic 50s lacquer and I popped that neck on just to check, and it's the same issue. It looks like the size of the heel/pocket "shelf" area of body is just routed strangely there on the cutaway size. For a factory neck to match it I believe it would also have to also be shaped differently. Maybe the Road Worn 50s necks have a different heel shape (?)--I don't have one to check unfortunately--but that would seem strange to me.Didn’t realise the neck and body aren’t factory pair. Maybe they’re both perfect with they’re original partners?
Thanks everyone for your input on this thread. I'm hoping for the same happy ending you describe @Beebe