Mount 3 separate seats, there is room. My buddy was mocking up some seats I had in my shop. The middle one would need to be shorter.That's super cool. I wish the Fuso cab fit a third person a bit more liberally. I know there's technically a 2-person bench over there, but I doubt my wife/daughter could share it for the kind of time it would take to get anywhere in the Southwest at 62mph.