I have this kit, and I opened the box but that is about it. Some Fireball steelies, dog dish hubcaps, and Radial T/As were tossed in the box and put away.
That said, I don't know what you are talking about because I haven't looked at the kit very hard. I was a kid when the cars were new, and living in California, I still occasionally see them on the road. My uncle Earl had a '73 Gold Duster slant 6, and my cousins and I were delighted that the driver's bench seat headrest hit the horn button when folks were exiting the rear seat. It always scared my grandmother.
Your post makes me want to dig the kit out of the stash and look it over. The box art makes the C-pillar look "chunky".