i have a 2010 1500 slt quad cab with the 4.7L engine. Currently I have supercips tuner, K&N CAI, magnaflow 18" muffler. The truck pulls like crazy after 30mph but I think a little better gearing would help with that. Don't want to go extreme but want to get a little more jump off the line. I dont have much experience with gearing but would like a little advice on wht my truck currently has stock and what people have gone with to get that extra jump off the line and where to look for a complete kit.