So far the only possible ways I've found, to give the F-16 to use F-15C cockpit is by modding it so it creates a "New F-16", but I don't like this way because then in multiplayer missions people without the mod see an Su-27 body low to the ground with american weapons.
Another way is to give the F-16 the F-15C flight and collision models, but aircraft behaves weird and it is not very maneuvrable, stalls out at 3G turns...
So for now the only way I prefer to release my F-16 mod, is the current way it is. So the right aircraft is visible in multiplayer missions, and uses the flight & collision models that Eagle Dynamics gave to the F-16 in the game.