I worked on a project for Ford when we were building the prototype 6.9s that put a cummins 5 cyl in a full size Bronco. It really did a number on the front suspension. The bronco is a lot more like a 1/2 ton truck so we had to try F-350 springs, still bent the axles after a while. This was a long time ago but the engineers didn't like the performance of the cummins, good power but slow accelerator.