is it 2wd or 4x4? cuz I think the 4x4 has the t-bar susp. while the 2wd has coils.. I could be very wrong but if I am right and you have the t-bars look up either RCD or superlift, if you have coils, I have no clue lol
31's should fit fine anyway, I'm stock height with 31's just need to get levelled possibly with the coilover kit shadow905 is offering.