I have my grandmother's 68 Valiant she bought new. It probably drives about the same as your Dart. I've driven a lot of cars but the Valiant is just, comfortable. Chrysler really got it right with the 67- up A Bodies.
That is so cool! Aren't we the lucky ones. I always heard 67-up A bodies are the best handling mopes out there but I'm still shocked, in a good way of course.
I measure these old classics by 1. how much the owner enjoys his ride, no matter what the venue. 2. Never by what it means to anyone else except maybe family 3. the $$$$$$ is never a measure for anything in life actually.
The old classics I have enjoyed the most over all the decades were the ones I built and drove the most miles!