Stock wheels with around 5.5" of backspacing work fine with 31s. If you want the ties/wheels to stick out farther, get wheels with 3.75-4" backspacing.what is a properly backspaced wheel?
p.s. If your springs measure 12" front and 8" rear as it sits, look for these on top of the springs and measure the thickness. That will be the lift height.
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