Ditto Redline's comments. I did my own, doable but dirty. Just go slow. However, mine was half-ton running gear, which appears much easier than the 3/4 ton (from pictures anyway). My truck is a 3/4 ton, but I used 1/2 ton Napco running gear. Seems like it is much easier to get parts for the 1/2 ton running gear.
don