I could swear I read somewhere that it was also a good idea to box the frame in a small section somewhere near the gear, but now I can't find where I read that. I'm pulling the engine in my '79 Power Wagon and installing the brace at that time, so it would be the time to brace anything else. I'm not going to be doing any hardcore off-roading or towing, but now is the time to do anything preventative.
