Heat oven to 350°F. Place pie crust in 9-inch glass pie plate as directed on box for One-Crust Filled Pie. Sprinkle coconut and pecans in bottom of crust-lined pie plate.
In 2-quart saucepan, heat sugar, butter and chocolate over low heat, stirring constantly, until smooth. Pour chocolate mixture into medium bowl; cool 5 minutes. Beat in flour with wire whisk until well combined. Beat in evaporated milk, vanilla and eggs with wire whisk until well blended.
Slowly pour chocolate mixture over coconut and pecans in pie plate. Cover crust edge with 2- to 3-inch-wide strips of foil to prevent excessive browning; remove foil during last 15 minutes of bake time.
Bake 40 to 50 minutes or until center is set. Cool on cooling rack at least 1 hour 30 minutes before serving. Top individual servings with whipped cream. Cover and refrigerate any remaining pie.