A guy I talked to the other day told me that the "a" pillars and windshield stainless on the 67-69 dart are the same as the cuda. Can't prove it though just hearsay.
I think GTGrinly is correct. I recall pulling them out of 67-72 Darts and 67-69 cudas, and if I recall correctly, they were the same. I believe they all share the same cowl / windshield structure.