And Matt, IMO, I would run 2wd F150 springs reversed in your situation. It would move your axle back a bit, allowing you to fit the back seats easier, and give you a better departure angle. Here is the FAQ on pirate about em and here is a spring chart. But, you have to run an anti-wrap setup with them.
jacob as for the back seat i am going to do a 36" bench mounted between the frame rails almost above the axle so wheel base wont be too much of an issue, similar to the f-toy pics that i posted earlier