I just bought a uni filter (the kind that removes the airbox). I have stock exhaust (I have a 1 year old and want to save his ears). I live in Lake Havasu which should be really close in elevation to Phoenix. What jetting should I run? I just put in a 50 and 160 and turned the a/f screw out two turns. Does that sound right? Also, I will be adding later a ported head and a stage II cam. How much will that change the jetting??