back when I still built carriers,,,,,,the Kennedy was one of the Problem children
she was almost a Nimitz, but the deck layout was different (see the angle between the bow cats, and the starboard elevator layout
she had the same machinery as the America, but a different hull, again, compare the elevator area at the oval access doors to the hangar deck
after getting burned by buying the "CV-67 Georgetown" model (It's a Nimitz in the box),,,,,,I decided that I'd have to combine the Nimitz kit with the America kit (the exact opposite of Kinsey's method of building an America in Detail and Scale),,,,,,,and use a Monogram Island with plastic slabs in all three planes to increase it's buik,,,,,and then use bridge parts cut up (in 1/720 kits) to restore the island to the Monogram shapes
I sold off my CV kits after figuring this out, but before I got to the kitbashing part for the one-off ships
hope this helps
Rex