Biggest issues I see are: 1) Rear end goes from Dana 110 to a Dana 80.
2) Front diff goes from Dana Super 60 to standard Dana 60.
3) Wheels go from 19.5" to 17" - that means no more F or G load-rated tires.
4)Towing capacity remains the same, but payload drops considerably (I forget the # quoted, something like 500-600 lbs.)