I just picked up a 55 C600 with a Y block and manual in it. This truck has some kind of expandable frame that really put a hurt on my car trailer for weight.
My plans are to pick up a box van setup in an E350 or so setup and put the engine behind the cab as well and make it a sort of slant back sort of flat hauler with dovetail. If I can get another cab in my possession, I'd like to crew cab it but not sure if I have the time or energy for that.
I also grabbed a set of 19.5" 10 lug wheels with a set of American Force adapters for the 1 ton and these will go under the truck. They are on my F350 for now just to feel them out.
I can't wait to get started on it!