There are several ways to tie a cage in to your Jeep’s frame. Here are some runners on our ’49 CJ-3A as an example. If you are going to wheel your Jeep hard and without a care for flops or rolls then we would tie the cage directly into the frame and forgo any kind of bushings. Bushings will isolate vibrations from the frame, but they are weaker than tubing. Cage tie-in runners should be as straight as possible since bends are inherently weak. We would also tie the cage into the frame at the foot of the A-, B-, and maybe even C-pillars if this is gonna be a roll-happy rig.