Drew, I don't think they are correct on that.
With the curved design on the chally dash, I just can't see a barracuda dash sitting on there.
I would call them and explain that there is a difference.
At Jims, they are two different part numbers which tells me there is a difference.http://www.jimsautoparts.com/dashcaps_and_dash_parts.htmPlus, looking at your original dash, the Challenger has the small bead or belt running on the top where as the Barracuda does not.
The more I look at the two, the more difference I see.