Yes, there is a difference in the rocker shape. the original car's rocker had a definite up-curve to the back edge of the front fender. The ERA cars (427 and Small-block) do not have as much up-curve. Originally, on the 427, that was mostly hidden by the side pipes so we weren't concerned. It does show up on the under-car versions of all the models, but only if you're looking for it.
