I believe your 7028268 is from a '68 400/400HO GTO with AT.
I had remembered the 7028264 from my years of looking for one at swap meets. Never dreaming I would still own the car decades later, in the mid- 70's I had my original replaced as a quick fix for a problem I had with it. I now have a 7028264 but have not put it on my car yet.