The w123 seat uppers hold the adjuster handle and seat belts which are driver and passenger specific. The seat belt can be moved but the adjuster handle is a bit tougher to move from one side to the other. I've just taken the skins off a passenger seat and moved them to a drivers seat. The bottom was easy but the top I had to keep the drivers seat frame and cut a hole for the armrest in the swapped cover. I've got a passenger seat upper frame sitting in my garage right now. I also have a vgc palamino drivers seat upper- but no arm rest.