ok i have an 06 chevy silverado 4.8 stock i have nothin done to it. well when income tax comes in i'm getting a tune,my GM performance parts cai, and gmpp cat back. i also want to get a cam and gears but have no clue on what to get? i can get gmpp parts at a real good price if i were to get gmpp what would be good for a stock engine and its also my daily driver. i want to get 3.73 gears and a cam i eventually want to spray my truck. it doesnt need to be gmpp. is there any difference between gm 3.73 and richmond yukon or any other brand? are some better than others? same thing on the cam? is there some better than others? sorry for all the questions i just dont want to go wrong with my truck. i know theres alot of threads about this but cant find the right one thanks in advance.