“1970 Dart Swinger Convertible”

I know of at least 3 others. Owner of Wildcat Auto Wrecking in Oregon had one for many years and it was pristine - looked like it rolled off the factory line. There was a blue one in the Seattle area (called Frankendart), and I saw a brown one at Carlisle in 2001. All those cars were made from 1967-69 convertibles that got hit from the rear. Big question is if this is titled as a 1970 hardtop, did they go about this the other way around (grafting earlier convertible parts onto a 70 car) or did they just use the dash VIN from a donor 70 dart?
This car started as a 68 GT convertible. I cut and modified the 1/4's when I built it over 30 years ago. The exterior sheet metal is '70. This car comes with a clear 1970 title, fender tag, dash tag, door tag, and trunk rail VIN. The core support is '70. The only change still needed is to modify the voltage regulator mount on the firewall. It will need a new tail panel as the one sitting in it now is bent. The best thing is to have a parts car available.