I wish to add aditional fuel capacity to my 2000 quad cab 3/4 ton diesel with short wide box. It is important that the usable bed length not be reduced. (I can't use an across the bed tank for that reason. ) I am looking for tanks that mount along the side of the box next to the fender wells and do not make the usable width of the bed any norrower than the flat space between the fender wells. I have seen tool boxes made to fit in this space, but have been unable to locate fuel tanks that do so. Any suggestions will be greatly appreciated. Thank you.