Purdue Arrow is right. The MD-11's still have the brown leather seats in their business class cabin, they are not going to be reconfigured since they are on their way out. There's no point. The last MD-11 will be phased out at the end of this year. Earlier this year, my parents flew on an MD-11 from Sao Paulo to Dallas in business class, they said the aircraft looked old. I knew what they meant, they meant that the aircraft didn't have the new seats.
The 767-200's do have the new seats in the coach cabin and business class but they still have the old brown leather seats in first class. Aaron, the 767 you'll fly on from LAX to JFK definitely has a three-class config and three classes of service. If you fly business class then you'll have the new seats, you'll love them. You'll find them very comfortable.
Have a nice trip.