The final piece of the puzzle is the rear sill end closing panel. We drill some holes and plug-weld it to the inner sill and the heavy-duty gusset. That’s baout it for the floors and sills on this one – and the hidden subframe. We ARE now selling “hidden subframe kits” with these heavy-duty gussets and the pieces behind the seats and the frame rail mounting plates. You can source the tubing locally, or we can provide that too – cut to the proper length! – Call me about it if you would like the kit – (443) 907-2287