I'm bummed. I just ordered a YJ Rear Bumper Frame Kit from 4wd.com. The picture was of the TJ installed (bolts only), apparently after checking the Rockhard4x4parts.com catalog, the RH2001-YJ kit says (welding required). Now I'm bummed. Won't have this all put together for a while.
I have to drop the gas tank, schedule and tow my pile to a welder, disconnect the rear leafs, ...
Brighter side, hopefully my bumpers ready for pickup tomorrow afternoon.