Preheat oven to 350°F.
With a hand beater, beat eggs well. Beat in corn syrup, sugar, butter, pumpkin and vanilla until well-blended. Arrange pecans in bottom of pie shell. Slowly pour egg mixture over them. Bake for 1 hour or until knife inserted 1 inch from edge comes out clean. Let cool completely before serving to allow the filling to set up.
Garnish with whipped cream .