1. Preheat oven to 325 degrees. Grease and flour two 9 inch loaf pans.
2. In a medium size bowl, sift together the flour, salt, baking soda, baking powder, cinnamon, cloves, mace and nutmeg.
3. In a large bowl, blend sugar and oil with an electric mixer.
4. Add eggs and beat until well blended.
5. Add pumpkin and vanilla and continue to beat.
6. Gradually add flour mixture to pumpkin mixture.
7. Once blended, pour in pans and bake for 1 hour.
Remove from oven and cool in pans.