This truck was in pieces when I got it. I had to piece together parts for the seat, I just got the cushions from Tophat. From what I can see the frame gets bolted to the Riser that's in the cab, the back seat cushion goes on to the frame first then the bottom cushion slides in. My question, is the bottom cushion just held in place by the back cushion? And how does the seat slide when the frame is bolted to the riser? I don't get it. I saw in another thread, a spring on both sides of the frame. It's a 52 GMC, seat frame from a 50, cushions from I think a 49.