Front Bench Removal -- A body help

So in my 66 dart sedan, the front bench, in the drivers side, seems to have a broken spring or something, as I just sink way over towards the door. Also a piece of metal band
and popped out the back of the seat, down towards the bottom.
I need to remove the entire bench seat. How is this done? Will it slide off the tracks and then come out? Or do I have to unbolt the tracks and take the whole thing out at once??

seat break - 1.jpg