Thanks for the replies...One of the haulers had a "garage" enclosed with the sleeper problem is I'm sure that it isn't dock high and wasn't sure if it was feasible to remove the garage section and or adjust the frame to put a dock high box on it. or wondering if one that is set up for a fifth wheel and remove that and add a box would be the way to go although at present I have no measurements to determine the lenght of the frame from the sleeper to the end of the frame. Maybe it would have to be stretched. I've seen so far class eight trucks so I believe everything should be ok weight wise but will make sure to check that all out.