There are many advantages to swapping an early Bronco Dana 44 into the front of a Wrangler YJ. The Dana 44 has larger u-joints, bigger ring and pinion, larger axle shafts (30 spline), beefy internal hubs, 5 on 5.5″ wheel bolt pattern, and good pinion placement. The Dana 44 also has more ring and pinion options than the reverse cut Dana 30 in the YJ. Lockers are generally cheaper for the Dana 44 since it is such a common axle.
Who in their right mind would take a perfectly functional 9-year-old Jeep YJ, rip out the entire undercarriage, and replace it with parts from a 25-year old Ford?
There are a few candidates for a Dana 44 swap into a YJ. I built my axles basically from the ground up from salvaged axles and new wear parts – new ball joints, u-joints, bearings, R&P, lockers, brakes, etc. Total cost was around $2700 for completely rebuilt front and rear Dana 44s with 4.88s and ARBs.