That's a big difference. I'm getting the ones I have are for the Impala so far. I haven't heard anything on if they are good for the Chevelle yet. So, they must not all be the same then. Thanks Darrell. The taper from one side to the other, I wonder if the reproductions are like that. I have thought about trimming them to match the Camaro grills but I have no idea what it would take to match them.