I am running the classic locks with 3 1/4" BS on the LJ with 35x12.5 R15s. The further you space out the tires the more stress on the bearings but the more stability in turns/off camber because of the wider stance. With 33x12.5R15s you need about 3.75" backspacing for no rubbing. You are only spacing them out less than 1/2" more.