4x4Junkie I'm pretty sure installed a cable from side to side to act as a limiter, through a tube mainly to stop overextension while ascending steep hills, it moved side to side so there was still suspension travel but the total extension was limited... if memory serves he went from the sway bar mount points on the front of the axle.
That is it. I still run the cable, and recommend it highly if you are running flexible springs (Jeep XJ, JK, JL, or JT front springs or early Bronco front springs).
Typical limit straps can be used too, although they will limit your downtravel during articulation (where one wheel is up, the other down) which was something I wanted to avoid since I occasionally frequent trails like Rubicon and similar having big rocks to crawl over. Best way for these is probably to go straight from the frame near or above the bumpstop (or from the coil/shock bucket) to a bracket welded to the beam or radius arm.
Pics for others reading who may be curious: