Up grading from a 2009 F250 to a 2009 F350. The 350 is 2 1/2" higher than the F250. The smaller truck is the perfect height (after the suspension squats about 2") for the 5th wheel. The new truck will barely notice the the trailer on the suspension. I'm going to have to jack up the trailer up at least 2", maybe a bit more. I might be able to lower the hitch in the box to help and some combination of spring/axle blocks and taller equalizer. I've seen some blocks on Amazon, and a buddy said he just made his own. Standen's has the tall equalizers but I didn't think to ask about the spacer blocks. Anyone know of a shop that may have various sized spacer blocks on hand?