Yes on the frame. In my pictures when you see me working one side, the other was bolted down and both shackle mounts were in place on the rear. Those brackets do not come with the floor panels, they are separate items. This process worked well for me, before I removed the body from the frame the floors, cowls, and door fit was all complete. The rear corners I did off the frame, you need to for access and they don't affect the structure.
