Preheat the oven to 350 degrees F. Grease three 6x3 inch loaf pans. Line with strips of parchment paper and grease again. If you prefer, you can just spray with flour-added baking spray.
In a mixing bowl, stir together the brown sugar and eggs until smooth. Add the oil and stir until smooth, then stir in the cinnamon, cloves, nutmeg, and salt.
Mix in persimmon pulp, followed by the baking soda, making sure there are no lumps in the baking soda and that it is evenly dispersed. Add the flour and stir until blended, then stir in the nuts. If using raisins soaked in bourbon, add them too.
Divide the batter among the pans filling about 2/3 full. Set pans on a rimmed baking sheet and bake at 350 for about an hour (start checking at 50 minutes) or until a toothpick inserted comes out clean or with moist crumbs.