Nathan, actually the newer bolsters top hole is in the same place as the old bolsters, so the new bolsters do not make the truck sit any higher in the rear. The problem with the new bolsters are the legs on them are so long the lower links will be running downhill from your diffs to the legs, they should be level or up hill.
The newer kits also deleted the U-bolts and went with a cheap looking setup, four Phillips screws holding the spring packs together.
Cushman, like Nathan said Scale Art is the way to go. Not cheap but worth it.
In this photo my truck has a milled down front axle and Oswald suspension on the front and rear, but the rear bolster are bolted to the inside of the frame rails lifting them up. This was just an experiment, the ride is perfect doing it this way but the articulation is not what it should be. I will be putting Scale Art parts on my truck next move.
