The first gen 4Runners has an optional bed floor that bolts in where the rear seats are. Some of the cheaper 4Runners from 84-85 came with them. The front has a 4ö lip and is about 3ö away from my front seat when moved all the way back. I use mine most of the time and install the seats when friends are over.

Adam W.
87 4Runner SR5 - 22RE w RV head & TRD Cam, LCE header, W56B-HD, 4" Stage II, 1.5" BJS, Rancho T-bars, F 5.29, R 5.29 ARB V6 FF w LC disks, 35" MT/R's

85 4Runner frame, 5" Marlin springs, 5:29 ARB HP front. Work in progress - Always!