In a large bowl, beat two eggs. Add corn syrup, sugar, butter, and vanilla. Stir in pecans. Gently scoop pecan filling over the pumpkin layer. Bake for 30 minutes until the top of the pie is golden brown and filling would have puffed up and set when removed from the oven. Cool for 2 hours, cover and chill for at least 6 hours or overnight before cutting into slices.