I picked up a pair of 71 B body buckets. Thinking about using them in another 71, but an A body. It appears to me that there isn't a lot of difference in the underlying framework of these seats between an A and B body, since they apparently take the same seat backs. Does anyone know of the seat foam is the same between car lines, and perhaps the difference is really in the seat cover, or if the seat foams are different, but the underlying frames are the same?