Many companies make 6" kits, but none make a SFA kit for an 00' especially if its a 1/2 ton. The main reason is cost. You will need a new transfer case if you have auto track, a dana 60 from a late 70's f-250/350 for the front, and a 14 ff bolt in the rear (there are other set ups but this is one of the strongest and most common) You alson will need new driveshafts, spring packs, shocks etc, etc.
The only company that makes a bracket to accept the new front axel for 1/2 tons is fabritech. Be warned though, good product and horrible customer service
My buddy paid for the brackets and didnt get them untill 6MONTHS later!!!
Be prepared to spend between 10-15K on this swap, and thats if you do most of the work yourself, though well worth it. Nothing looks better than a sfa Z