So they lengthen the rod, but the body stays the same, thus making full use of the body. Interesting. I read an article on how custom shocks were made but have never dug into the idiosyncracies of how shocks size, length and valving affect the shock as a whole. How much longer is the lifted shock vs the factory shock? I would guess that it wouldn't need an additional 3" since the shocks on the rear are at an angle, reducing the total overall length needed to accomplish the job.