Re: Breaks it angle
Time was the critical element, there wasn't enough time get a US carrier operational in the Royal Navy before the entire campaign was over (win or lose)
Crewing A US carrier (probably Forrestal class) could have been done simply by recruiting a few thousand recently ex US Navy sailors (politics aside).
Training would have been mostly a refresher course for many ex-FAA Ark Royal pilots who'd moved over to the Harriers.
Getting the actual Phantom & Bucaneer aircraft back from the RAF, now that would be the really tricky part.