Yes, you have it right. Based on my 427 car the current ERA has some bow but is generally straighter than the originals. When I built my car I shimmed the rocker panels down to enhance this feature to look a little more like the originals. I could only go so far as a practical matter but it got me closer. I don't know for sure, but as shown in the pictures above the ERA 289 cars are probably about the same.
My point was (is) that while the ERA 289 body shape may be 98% right on - this is one area that can be massaged a little to get even closer to original. I think it's an area that a lot of knowledgeable guys will look at first to distinguish an original from a replica at first glance. But, ERA is probably closer to begin with then most of the other replica manufacturers.
ERAs are great replicas - you can't go wrong with one of them.
