I am sorry to hi-jack this thread guys but I am currently facing the same problem. Im running 4.10s with 33s on my 86 22r right now. Im currently saving up money for my next gear/tire combo. I drive on the freeway mostly and occasionally on the street. Do you guys think that i will get better mpg with 33s and 4.88s or 35s or 37s on 5.29s. I would rather put 35s on my truck because I feel it would be better for the highway. Any help you be awesome thanks guys!!