Seats are easy to swap. Try one set for a while and then try the other set of seats. It doesn't matter how the seats look if you are uncomfortable in the car. Do not forget to mount the seat belts. They can affect how you set.
Michael
Remove everything around the bolt and have a large nut welded to the bolt. If possible use a nut that slides tightly over the bolt. You should be able to remove the bolt with the increased area to put a socket on.