I bought a front and back seat for my '39 Ford sedan a few years ago and as it turns out they are not for a '39 Ford. Although they are the correct width, they don't clear the drive shaft tunnel. They appear to be for a more flat floored car. The distinguishing feature is that the seat slides forward on the passenger side to allow easier access to the rear seat. They seem to be a little more plush than Ford seats. Any ideas on what they are?