I went to work closing in the passenger side floor. Had to work it around the steel 1X1 tubes that the seat bolts to. You can see where I also had to jump the floor up so I can run the coolant from the radiator in back up to the front. The seat rear mounting tube was so low it was too tight above the ladder bar crossmember and would have forced me to run the cooling tubes into the trans tunnel, which bothered me in case I should snap a U joint. If if did it would have hit the water tubes and dropped water all over the place. With the floor popping up there I can run the water supply up and over the crossmember but under the floor away from the driveshaft. Then I used automotive chaulking to seal the weld joints and I used a brush on bed liner on top of that.
This is what it looked like before the metal was put in.
I'll get some sound deadener and custom cut and fit some carpeting. I just have to do the same to the other side now.
I'm also making a raised box where the back seat was. This will have an angle iron frame and a hinged wood top so I can store stuff under it and lock it up. It'll get carpeted to look like the floor and it will finish off the rear area much nicer.
Mark L