Can anyone think of a USAF fighter which was "beefed up" for carrier service"?
Some have gone the other way - USN/USMC to USAF. Carrier service is a whole 'nuther ballgame.
Think "converting a Ferrari, Lamborghini or Lotus to run the Baja 1000 vs running the Ford F-150 Raptor on a paved road course".
F-4 Phantom?
The Russians did it w/ the SU-27....SU-33. Just sayin'.
Only one which comes to mind is the FJ-2 Fury, an effort to navalize the F-86.