Can someone please confirm one way or the other if these guides talked about in this thread were typically installed on '72-'74 E-bodies? I'm currently working on putting my '74 'Cuda back together, I have every single part that came off the car in little labeled bags, but it doesn't look like my car came with these. My original glass had bad scratches on it, maybe these were removed at some point? Technically though it looks like when adjusted properly it could do without them, so I'm confused. Any help is greatly appreciated!