It wasn't too bad. We bought the flatbed and hoist, and welded the aluminum sides.  We mounted the hoist on the frame backwards to get more dump. It dumps 72 degrees instead of 54.  This sacrifices some of the hoists capacity but its a 6 ton hoist and we can only put 3 on the truck.  It was more of a mental strain than physical.

nice how hard was it to make the dump bed for it?

That's different..