front bucket seats on '68 Barracuda

these are original seats AFAIK. When looking across the tops of the seat backs, should they angle in slightly toward the center of car or be more or less level/straight across the tops? I am think of adjusting with some washers under the frames; maybe they have been bent in over the years. Pic sort of shows what I am getting at. It's more pronounced when looking at them straight on.101_3254.JPG