I am leaving to go to Death Valley for a while and needed more room in the H3. There had been talk with friends that I would take the seats out and make it flat back there. Today, I did it and was successful. You can sleep 2 back there on Thermarests. I am 6' tall and fit fine. I think it could only fit up to 6'2". I also got some angled steel to bolt onto the side seat posts for extra tie downs. Everything turned out better than I thought. It is a prototype and made in a short time for the Death Valley trip. I'll have pics from there when we return.
The easy part. 18mm nuts were cake. The backs of the seats were another story.
This shows the fronts removed with the nut covers replaced, so I didn't cut myself.
You have to remove the nuts under these plastic flaps.
The backs are out now. They come out in one piece. I suggest 2 people to get it out of the H3. I see how much room there is now.