I'm about to be in the same situation axle wise. What width tire and what backspace/adapter with did you go with? Any clearance issues with that setup? I'm trying to stay pretty narrow without creating clearance issues and don't care if I'm a bit wider in the rear.I'm running them in the front because my front Dana 44 is TJ width and rear is JK width. I'm running 37's, so run a TJ to JK adapter to allow me to run JK wheels. They also are a spacer to give me more clearance.
They are fine to run, but I would only run them to fix a problem. I wouldn't run them because someone gave me free wheels. Up to you if it's worth it.