Prepare a bundt pan by buttering and flouring. Preheat oven to 350F.
In a small bowl mix together the flour, baking powder and salt and set aside. In a large bowl of a standup mixer, cream butter and sugar together. Add eggs, one at a time and beat well after each addition. Beat in vanilla and pumpkin. Mix in the flour mixture until well blended.
Divide the mixture in half. In one half of the batter add the cinnamon, nutmeg and cloves and mix well. In the other half add the cocoa and the milk. Blend well.
Spoon half the spiced batter into the prepared bundt pan. Then drop half the chocolate batter in by spoonfuls. Repeat with the remaining batter. Draw a knife gently around the pan to swirl the batters the more you do this the more the batters will be swirled together but don't over mix.
Bake for 60-70 min. or until done and tested with a cake tester, coming out with a few moist crumbs but no batter. Let cook for 15 min. and then invert onto a cooling rack to cool completely.