Floor Pan FSJ Complete Rear.  Both rears pictured, this is only for the RH side.
Floor Pan FSJ Complete Rear Includes Under Seat and Rear Floor pan.  Along with Front Floor Pan (sold seperately), does the entire floor in the passenger area. J-Series Truck 1962-1988, Cherokee 1974-1983, Wagoneer and Grand Wagoneer 1962-1992