I have a 2012 Sahara Unlimited I'm a newbie and I love my new Jeep! So I need some help!!!! i just ordered Duratrac 285/70-17s on 17" XD Addicts, I was wondering what size leveling kit i would need for the front? I have no winch, heavy bumper, etc... I was also wondering if it is possible that they make spacers for the rear as well. If possible ,I was thinking of doing 2.5" spacer in front and a 1.5" spacer in the rear end to level it out and give me a bit of a lift. Is something like that possible? If it is possible can i do it with out modifying/changing anything like my shocks, brake lines ect...? Will it change the ride, gas mileage or speedometer? Thank you, thank you, thank you guys so much in advance!!!!!