How much do you want to spend and do you trust another used Dana35. Everyone favors the Ford 8.8. Your choice either way it is a lot of work. Me I would use the opportunity to upgrade and get rid of the Dana 35. I vest a few bucks in the upgrade. If you have access to a good welder your in.
89 2.5 TBI, 4" RC lift, 1" Booms, SYE, Adams Driveshafts front and rear, Ford 8.8 with 4:88s, BFG 33X12.50X15, and a ton of other stuff.
AF Jeep Club Tail Number 184