Dave can you be sure the height of the transmission tunnel, and of the lower door frame, relative to the floor is the same in both cars? If not the comparison may not be accurate. Also the depth of the seat frames and squabs may differ. When I had my new seats made by Shaun at Allon Whites, I wanted a slightly lower seating position and asked about removing or planing down the wooden strips. He advised against that and instead made the seat squabs slightly less deep. There are so many potential variables here, and we know how Morgans differ from car to car even next to each other in the factory!