I opted out of making this change on my 99 GC, and went with these:
Went from turning rotors every 20,000 miles or less, to not. Just now starting to notice a little warpage, but it has been several years since installation. Other than a little noise when stopping due to the slots, I would make this change again in a heartbeat. Certainly beats the cost and grief of finding and changing calipers and rotors.