i would think that a 4 inch lift and some sort of a body lift would clear 35s. x2 on the wheelspacers. you would need to regear to 5.29 in order to have any traces of power or feul economy. but also bear in mind its not ONLY the size of the tire, but ratehr the added extra weight. gyroscoptical rotational inertia accounts for most of the power loss. if you subtract 5 pounds total from your total wheel/tire wieght, it is equivalent to subtracting 150 lbs from your vehicle wieght. just something to think about.
now for one of my questions. i am going to do a 4" pro comp lift for my truck. i am not going to spend the money on a re-gear. this lift and big tires is mostly for looks. my cousin has 33" muddies (with 17" rim) but i have 29" tires on a 15" rim. if i am ordering the 4" lift, i might as well throw in 17" american racing "teflon thug" rims too, and have them, with the 33s as my daily driver. how bad would that kill my fuel economy and power? because 29s and a 4 inch lift wont look too great. if i was doing any major long highway driving i would switch back to the 29s. thanks, and sorry if that doesnt make any sense.
Jake Engel