In a small bowl, combine all topping ingredients and set aside.
In a large bowl, sift together flour, soda, salt, cinnamon and nutmeg. Add sugar, oil, eggs and buttermilk; mix well. Stir in vanilla and butter flavoring. Stir in pumpkin and pecans. Pour into 3 greased 7 x 3" loaf pans. Sprinkle topping over batter. Bake for 60 minutes or until toothpick comes out clean. Let stand 10 minutes before removing to cool on a wire rack.