Reclining/folding bench seats...?

[briscuba]

Hi,
I recently bought a 1970 CST/10. I love the Black on green interior! I an inclined to thing that the bench seat may have been changed, however. I found a build sheet that doesn't exactly match in the springs (behind the seat). And, it does not fold. Didn't all of the benches fold? I even see a spring with a retainer on the back wall near the gas tank that looks like it may have been a keeper for the seat........ Anyone know?

Thanks
brian