Guys if this has been covered please send me some links and Ill read but I haven't been able to find any on this subject. My dad has a class 8 sitting behind his house with 550000 on it Im wondering about buying a $ 10-15000 5th wheel camper and mounting it on top the stretched frame. It only seems like you would have to cut into the very front of the 5th wheel a little to fit the back and top of the cab. So this is what I need to know. I was thinking of a fiberglass shell 5th wheel because I'm good with fiberglass work so blending the fit at the cab wouldn't be that hard but what about the boxes underneath?? does a company out there make these boxes? I'm sure someone has done this mod Thanks for any help guys!