71 Duster 340 Inviolet V-24 How Rare??

Well it does make for a much more streetable car with undercoat thats for sure too. How well were these cars painted underneath from the factory? Did they shoot color over the whole underside and then undercoat on top of the paint or was it just painted with whatever bled over when top coating the cars and some parts left in primer? I see some pretty and shiney on the underside but can't imaging Chysler corp doing that kind of finish on the underside. Hell most topsides weren't that good if I remember correctly.