AMD 67 Barracuda Quarter Panels
I realize that you're asking specifically about full AMD quarter panels, but we ran into similar issues with fitment on partials for our '68 Charger. To get the contour right we had to make a series of slits on the front lip where it overlaps next to the doors. I wouldn't call it a major fitment problem. We noticed the issue when we test fitted the panel over the old quarters.