You can get a 2.5" lift w/ front springs and rear blocks for a couple
hundred and that will allow you to run 33x12.5's on 15x10's w/ very little
problem. PLEASE DONT DO A BODY LIFT! For the money you save you'll make the
Blazer worth less due to a hacked up fan shroud, UGLY gaps between the body
and frame, rerouted or loose gables, etc., etc... Do the 2.5" suspension
lift, add a set of 33" BFG A/T KO's on 15x10 whatevers, a set of shocks, and
a new steering stabilizer. Brake lines and driveshafts will be fine. Make
sure your front-end is in good shape, too. You will wind up with a sharp
lookin' SUV that will be plenty streetable and you will still improve the
off-road ability. You should have 3.73 gears and a TH700R4. Final ratio in
OD will be WAY to high for anything other than driving down the road at
speed. If you insist on keeping it in OD all the time, plan on having a
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