In a bowl, cream butter and brown sugar. Beat in the eggs, pumpkin, syrup, orange juice and zest; mix well. Combine the flour, baking powder, salt, cinnamon, nutmeg, baking soda and cloves; add to creamed mixture just until blended. Fold in raisins and pecans.
Transfer to a greased 9x5-in. loaf pan. Bake at 350° for 55-60 minutes or until a toothpick inserted in the center comes out clean and top is golden brown. Cool for 10 minutes before removing from pan to a wire rack to cool completely.