True but A-bodies are also about 1000 lbs lighter so there's that. I see modern Challengers like shortened C-bodies as that's about the comparable size and weight lol.
Absolutely, they are heavier by far. In my case, I think it was only like 600 or 700 pounds different between my Duster and my Challenger, but my Duster isn't really a light weight either. Nice thing about that is, a 5.7 in a Duster with similar gearing should run with or even outrun a Scat Pack without having to spend the money for the "big" motor.
Funny thing is, the Duster and Challenger are within inches of each other length wise. When I was working on building a garage years ago I did some layouts to see how my cars would fit in it and when I went to get the width and length of a new Challenger and found out they are almost identical to my Duster, I just used the Duster twice. So size wise, I see them as very similar to an A-Body.
My only point was that a new Challenger is much more similar to an updated A-Body than a new Dart is. Not that a Challenger is the evolution of the A-Body. And I know the original post was intended to snub the idea of modernizing an old car and a new Dart is a more pointed weapon to try and poke at someone with