what about setting up slider tracks for the seat bottom, and hinging the seatback to the seat bottom(if it's not already)
i havent taken the seats out before to know if this will work, just the first idea that popped into my head.
with these slider tracks(like are on the front seats) as you slide the seat bottom forward, the seat backs would follow on the bottom and recline up top.
don't know if this is clear enough to understand, if not i'll sketch pics of what i'm talkin about
later and good luck
josh