Combine corn syrup and next 6 ingredients in a large bowl. Beat at medium speed with an electric mixer just until blended. Stir in pecan pieces.
Pour into prepared Death by Pecan Pastry.
Arrange pecan halves on filling mixture.
Bake at 325 for 1 hour or just until set, shielding edges of pie with aluminum foil, if necessary. If desired, serve warm with whipped cream or ice cream.