Bed solution
So I had been trying to decide what I wanted to do for a bed. I wanted a full size mattress, but didn't want to lose the storage under the bench, or the seat belts in the back. After running through a bunch of ideas and sketches, I finally decided how I was going to do it. I started by cutting notches out of the plywood to go around the seat belt brackets.
Then I attached the bottom piece with piano hinges.
I then angle cut some 2x6s and 2x4s to build the back rest/bed feet.
My thought was cutting the 2x6s at an angle provides more comfortable sitting instead of being 90*. Also, when folded out into a bed, that provides all the support to the outside edge.
I attached them with hinges so I can fold them down and be able to lift up to access the under bench storage.
Next I need to make some swing out supports and then get the mattress installed.