The 763's must be UA's ghetto birds, which were configured for domestic rather than international operation, because I don't think CO operated any 763's. All of UA's international 763's already have lie-flat C seats, in the rather pleasing 2-2-2 alignment. Will all of the additional 763 conversions become 3-class aircraft (and therefore interchangeable with the rest of the 763 fleet) or are they introducing a new 2-class variant? I assume that the 763 conversions will enable the 762 retirements, and essentially replace those aircraft. Once the 787's start arriving, UA could potentially have some significant growth in the international fleet.