Edit: I did find an article that states the fuselage was different between the two, but that the FJ-2 was nearly identical except for the engine (and the arrestor gear of course).
Okay TKO, when 21st runs out of Air Force schemes, they may want to consider this:

Pass it on.

Edit: Curses! The FJ-2 uses the slatted wing, not the 6-3 wing the 21st Sabre has. Where's that Admiral Toys thread?