How similar are the frames on A body bucket seats, for example could I use 70 seat covers on 75/76 seats, if I also changed the foam?
Picked up some later buckets at a good price, butLegendary only has black or white covers, and I need to match the 2 tone blue in my wife's Dart.

70 seats have plastic backs, and seat bottoms differ

The later A body(1972 to 1974, I don't know about the later ones after 1974) are lighter in weight than the 1970,71 where As already said the seat backs are different. Maybe Legendary would make the covers in the color you want for the seats you have

Thanks for the replies, Legendary can make them but at what cost. I might try a local custom interior shop and get a quote from them and see what gives the best value for the cost.