Just a suggestion to Phantom lovers:
If you want to use several of the F-4 for one civ, I would suppose to include the upgrades. For example, German F-4s were upgraded to the ICE (Improved Combat Efficiency) in the 80ies, Hellenic F-4s to the "Peace Icarus 2000" standard (PI 2000), Turkish ones to the "2020 Terminator" standard.