I just bought a 1996 chevy Astro today. It is in really clean condition and looks like it will solve my needs...the only thing I would like to change is to add another seat in the rear. Now it only has the two seats up front and the bench in the middle and can seat 5. I want to add something in the back so that it can seat 8. I do not see any kind of hardware on the floor to add this. Is it difficult? I would prefer to add a seat that will fold flat to form a bed...or some kind of futon.

Any suggestions?

If you don't have factory anchor points for a factory seat, shortof replacing the entire floor pan you'll need to go to the aftermarket. I came accross this after a quick Google search: http://www.discountvantruck.com/rvvanseating/allvansofabedsseats.htm

Good luck!