If you're planning to do towing, you'll want to keep that 3.73 gear. Also, you'll want to keep the full floater, as it's much stronger that the semi floaters. For disk brakes, check out the '01-'07 GM 3/4 ton trucks, the smallblock powered 3/4 tons used the same 14 bolt rearend with disk brakes, should be an easy swap.
