As I said before the frame on the 86 f250 and my Bronco where identical in the front, the same hieght, the same width, the same boxed areas and all. As for the D50 it is alot beefier than the D44 that was under the truck, and I swapped in the front leaves so as to get rid of the arms. My Bronco has seen some pretty rough stuff (nothing like extreme) I use it as a truck. By this time next year the whole frame on my truck will be boxed.