I had a '67 Satellite with a small block and fiberglass hood that weighed 3310 with half a tank of gas. This was the same scales I've observed other heavyweights on so yes, its possible some combinations are considerably lighter than others. In my observations, most of the classic 68-72 big block mopars that most find as the most desirable models tend to be just shy off or just over the 2 ton mark. This goes for E bodies as well as B bodies. I've seen quite a few 4000# Challengers out there.