In a large bowl, combine the flours, baking soda and salt. In a small bowl, whisk buttermilk and molasses. Stir into dry ingredients just until moistened. Fold in raisins and nuts. Transfer to 2 greased 8x4-in. loaf pans. , Bake at 350° for 45-50 minutes or until a toothpick inserted in the center comes out clean. Cool for 10 minutes before removing from pans to wire racks.