[BarryGMC]

OK Greg . Before it gets to far off the rails lets talk about how you use your truck. First you have a heavy high powered top heavy rig most likely riding on tires designed to give a smooth ride on a 3000 lb vehicle. Any full size 60-87 GM truck will suffer from poor performance in the curves with a P rated 225 or 235 70 or 75. 15 inch tire. To counter act that somewhat a Lt rated tire in the same sizes will give better performance due to its heavier side wall and higher load capability. Theses tires still give a look that is more stock. A lot of the sway you are experiencing is really the tires deflecting under the lateral load. your outside front wheel in the curve is pushing down a couple of inches closer to the ground . The best way to get better performance in a tire is to use a tire designed for more aggessive driving. These would be something like a BFG. Radial TA in 225-60-15 . However these don't give a stock look. And they really need a 6 or 7 inch wheel. The best compromise I have found is a Lt rated 225-75-15 with 35 psi. It looks stock and performes ok.