Preheat oven to 350 degrees. Grease and flour bottom only of one 9x5 inch loaf pan. In a large bowl, combine sugar, oil, water, eggs and pumpkin; beat 1minute at low speed. Add flour, soda, salt, cinnamon, nutmeg and cloves; blend at low speed until moistened then beat a minute at medium speed. Stir in nuts and raisins. Pour into prepared pan.
In small bowl, combine all topping ingredients until crumbly; sprinkle over batter. Bake for about one hour. Cool 5 minutes; remove from pan.
Cool completely on wire rack.