I have just finished putting a Whipple Supercharger on my 02 5.3 Tahoe. The car runs great but frankly not my expectations! I think it's heavy car and I'm considering changes to the axel ratio. I have 3:73 on and looking for 4:10. I need help on couple of things: - How much Improvement should I expect in take off? I know it's not high way gears but my car is used alot in city driving and off road. -Do I need to match the same ratio to the front end, i.e both 4:10 in back and front? or can I just change the rear ratio and keep the stock front? - What other mods I can put to improve the performance? I have already put Headers and cat back, High flow induction but i would not touch the boost to keep the car street use! Any Help, thoughts or ideas are appreciated Guys.