KC-777
There are far better sources out there that are more current than that one you have chosen to use.  You might find some in the Boeing KC-767 page. As written, your item implies it is still being activley considered, which it is not - Boeing went with the KC-767 earlier this year. Sure, it's still a possibility for a future order, but that is just speculation at this point. Incidently, the story you cite doesn't say it would take two years to convert the KC-777, but three (but I wouldn't know that as I didn't read the story). -