Heat oven to 325°F. Place pie crust in 9-inch glass pie plate as directed on box for One-Crust Filled Pie.
In large bowl, beat corn syrup, sugar, butter, cinnamon, nutmeg, vanilla and eggs with wire whisk. Stir in pecans and 3/4 cup of the chocolate chips. Spread evenly in crust-lined plate. Cover crust edge with strips of foil to prevent excessive browning.
Bake 30 minutes. Remove foil; bake 15 to 25 minutes longer or until pie is deep golden brown and filling is set. Cool 15 minutes.
In small microwavable bowl, microwave remaining 1/4 cup chocolate chips and the shortening uncovered on High 1 minute; stir until smooth. Drizzle chocolate over top of pie. Serve pie warm or cool. Top each serving with whipped cream. Store covered in refrigerator.