I need some guidance please. I purchased a new 2009 Bighorn 3600RE and have always used a service to haul it. I have purchased a 2008 F350 short box (6.75') to haul it on my own. All the literature allows that the Bighorn is matched to extended cab, shortbed trucks. If that is indeed accurate, I have plans to purchase a new hitch to install in my truck bed. It has come to my attention that older style 5th wheel trailers required a special hitch to adjust for the shorter bed. Any help would be greatly appreciated. JBN