Preheat oven to 350°F. Lightly oil two 9 1/4 x 5 1/4 x 2 1/2-inch loaf pans. Dust pans with flour. Sift first 6 ingredients into large bowl. Using electric mixer, beat pumpkin and next 4 ingredients in another large bowl to blend. Beat in dry ingredients just until blended. Stir in raisins and pecans. Transfer batter to prepared loaf pans.
Bake until tester inserted into center comes out clean, covering breads loosely with foil if browning too quickly, about 1 hour 20 minutes. Transfer pans to rack. Cool 15 minutes. Remove breads from pans. Cool slightly. (Can be prepared 1 day ahead. Cool completely. Wrap in foil. Store at room temperature. Before continuing, rewarm in 350°F oven 15 minutes.)