I have a '66 Galaxie and want to get a complete interior kit. Problem is the previous owner put buckets in from a mustang. I searched locally and found someone selling '65 buckets, and another '67 buckets. To me the frame and trim looks the same. My question is, are they the same? If I bought the seat covers for a '66, would they match up to a '65 or '67 bare frame?