I run these on my XJ buggy and love them. They bite like you wouldn't believe in the rocks and are virtually indestructible. There's a reason rock bouncers run them. I usually run them around 3-5lbs.
I ran them on the XJ prior to the buggy build briefly on the road to work periodically. Do not purchase these expecting a nice ride. They're heavy, wear like crap and bias ply so one day they'll be balanced, then all of the following week not be, etc. But know that you'll be getting a superior off road tire.
They speak of my drinking, but they never consider my thirst