I have a 2007 new body GM crew cab 1500 has the 5.3 ho I am going to order a circle D converter 3000rpm what is the best cam to go with that ? I have 2 cams already but neither are the greatest I have an 02 z06 cam and a hot cam ? the truck has an exhaust headers, cold air, and its 4 wheel drive with 33's. If I run the zo6 I can avoid the tune right ? I guess it does'nt matter I have new era here in NY do all my tuning anyway. Let me know what you guys run in your 4x4's for a daily driver.