Preheat the oven to 350°F. Grease and flour a 10-inch tube or Bundt pan.
In a large bowl, beat eggs till foamy. Stir in pumpkin, vegetable oil and bran cereal; combine well.
In another bowl, sift together flour, baking soda, baking powder, salt, sugar and spices. Add to wet ingredients and mix gently, till just combined. Stir in nuts and chocolate chips.
Spoon the batter into the prepared pan. Bake in preheated 350°F oven for 70 minutes, or until a cake tester inserted in the center comes out clean. Remove from the oven and cool the cake in the pan for 10 minutes, then remove from the pan and cool complet