Most likely it was your harmonic balancer that broke, and took the crank pulley with it. They have a tendency to do that. I would reccomend replacing it with a BHJ billet one(~$350), or if that is out of your price range, an OEM Ford unit. It most likely took out your crank sensor also, so be sure and check that. Those are ~$70 from Ford. Good Luck.
Thomas