Use the Mountain Offroad "Bomb Proof" motor mount brackets to replace the factory 3-bolt brackets. This replacement bracket bolts on using 7 existing threaded holes on the side of the block. By spreading the massive engine torque throughout the additional bolts (instead of just 3 factory bolts) these block brackets will save you expensive engine damage, not to mention being out in the back woods broke down. These block brackets are to be used in addition with the factory motor mounts or Mountain Offroad motor mounts.
Now that rock crawling has become the favorite past time for Jeepers and Jeeps are being put in places that they were never designed to go, the stresses on the stock Jeep motor mounts and engine block are tremendous. With deep gearing, big tires, lockers, and mega torque, the stock mounts can be torn apart in no time at all.