No Jeep rear axle was ever reverse cut. BTW, contrary to what many magazines print, the term reverse rotation is incorrect. The gears turn the same direction, but they are cut opposite of standard since the pinion is on the upper side of the ring gear.

No YJ Wrangler ever came with a Dana 44 either.

That "Dana" 20 is actually an AMC 20. A Dana 20 is a transfer case.