well, now I need a record player in my Jeep. just great...
hypothetical arguments and issues aside, at the end of the day this particular disk brake upgrade is as cheap and as easy as they come. hit the junkyard, find a ZJ with stuff in decent shape, bring parts home, install.
https://www.cherokeeforum.com/f51/rear-zj-disc-brakes-cherokee-xj-chrysler-8-25-a-57807/