Dart vs. Duster upper cowl

I've been working on my '70 Dart very slowly for quite a while now. Over the weekend I was stripping paint and got up to the front cowl. After grinding over an inch of mud out of the passenger side I found that at some point in it's life it appears something has fallen on it and they drilled holes for a slide hammer to try and pull it back up. In my opinion the only way to correctly fix it would be remove the entire upper cowl and put a new one on it. Due to the extent of the damage I don't think it would be worth fixing.

My main question is are the upper cowl (outside area you see between hood and windshield) on a Dart and a Duster the same? If so, are there differences in years or A/C vs. non-A/C that I need to look for. Just trying to find what I need without having them side by side. Thanks FABO.