Good thread idea Jim. I think it's very easy to restore better than factory. I would never restore a car to "factory condition", not 100%. Just too many things that were crap, it was 38+ years ago though but that's the reason I wouldn't as I think improving them while keeping it mainly hidden offers a greater driving car, as well as durability and longevity wise.
Here are some of the improvements I think the factory could have made, without going into great detail like blacking out screws, having head bolts point the same way, blacking out extra parts behind the grille etc. Simple yet dramatic improvements. Overall I think E-Bodies are fantastic the way they are and there really isn't anything major at all that needs improving.
# Better bucket seats that had side support.
# Slightly more back seat leg room.
# Better fit and finish, more so interior.
# Brighter instrument cluster light.
# Bigger wheels/tires.
# Lighter doors, stronger door & hood hinges, they're truly pathetic sag magnets.
# Tilt steering column to allow people to actually get in, in a dignified manner.