I finally attempted to install my new interior including a set of tan seats but the driver's seat won't slide more than a third of the way back. These were supposed to be a set but I'm wondering if I got 2 passengers' and no drivers' seat. Are there any differences other than the positioning of the fore/aft adjuster, are they reversible and if not, how can I tell if I have 2 passenger seats (other than the position of the fore/aft adjuster as these came without the rails and adjusters attached.