One of the reasons why the MiG-17 is such a tough adversary is that the AI breaks down when it comes to section tactics. In the game, if you unload/extend in your Phantom, the MiG-17 will always attempt to chase you. Now in real life this should make him meat for your wingman or any other friendly in the neighborhood, but in-game the AI simply does not respond appropriately, and you are left with the option of extending out a few miles, turning around and coming back with a head-on gun or Sparrow shot.
This is unfortunate because it is the reverse of what actually occurred in Vietnam, with the Fresco being swatted out of the sky like flies and the Fishbed considered the more dangerous foe.