A guy in our club uses what sounds like the same idea on his 1-ton SOA YJ.
You can see how long the block/bar thingy is in the front, and it's the same length towards the rear. With being this long it has almost zero uptravel and the thing rides like a gut wagon (he has really stiff springs on the front also). I guess it accomplishes his goal of eliminating axle wrap as he was killing rear u-joints.