New to the forum and pleased with the overwhelming info, ideas, and tips. That being said, I need your assistance. Im running 37s Goodyear MT/R with a K&N Air Intake kit and Dynomax Turbo Exhaust. It sits on a 6" Rancho sus lift and the gearing for the 6 man was changed by the previous owner. I do not what the rear end is. I bought a superchip and do not know what the best tune would be to suit it. I would like to run the best overall tune. Please help, thanks. "Promote the wave!"