I finished the cup holder for my 56, this is just the bracket for the cup holder. I still have my original ash tray too. Here are a few views of the cup holder, I just put it in so I haven't used it yet. This is what I started with, $20 for a 1960 F100 ash tray. I had to do some cutting and improvising to make it work. I couldn't find a 56 ash tray for under about $80, a car or truck tray will work.
I use a low tech cup holder, believe it or not the edges on a roll of duct tape are a bit sticky so the holder stays in place and doesn't move around, I use it in the '54 Ranch Wagon and the '32 Ford sedan. When not in use it slides under the seat ready to be used for it's original intent. HRP