You'll definitely want to get wheels with more BS or wheel spacers for a tire that wide. IMO, rubbing the rear shocks will be less of a concern than rubbing the LCA's during turning. I rubbed the rear shocks while flexed with 265's and stock wheels. I still rub with 285's and 1.25" spacers while flexing, but I don't know if you're going to flexing it out or not...
2000 WJ 4.5L - Stroked, Locked, & Long-Armed
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Parting out Built Dana 30: PM me or see Classifieds for pricing.
WJ Chromoly Axle shafts w/Spicer u-joints, Lockrite p/n 2210, Nitro 4.56 D30 Gears