Sorry, I have no photos but here's what I did.

I made a couple of seat frame mounts and the rear seat mount also serves as the mount for the seat belts. The rear mount is 1"x4" thick wall tubing. It's secured with grade 8 bolts welded to make studs. They go through the floor pan and then through the frame cross member. The seat mounts to a couple of welded tabs to this mount. For the belts I used nuts counter sunk into the bottom of the 1"x4" tubing. I'm comfortable that the seat and belt mounting would pass "TECH 1's" inspection, which is good enough for me, LOL.