For the cake: With the rack in the middle position, preheat the oven to 350 degrees F (180 degrees C). Line two 8-inch (20-cm) springform pans with parchment paper.
In a bowl, combine the flour, baking powder, baking soda, cinnamon, allspice, cloves, nutmeg and salt. Set aside.
In another bowl, combine the sugar, oil and eggs with a whisk. Gently stir in the dry ingredients. With a spatula, gently fold in the carrots, pineapple, walnuts, cherries and raisins.
Divide the batter between the pans. Bake until a toothpick inserted in the center of the cake comes out clean, about 1 hour. Cool in the pans on a rack. Run the blade of a knife around the cakes and unmold.
For the frosting: In a bowl, cream the cream cheese with the butter and icing sugar with an electric mixer. Add the zest and juice and continue beating until the frosting is smooth and creamy.
Spread the frosting over the top of the cakes and stack them on a platter.
For the maple walnuts: In a skillet, bring the syrup to a boil. Add the walnuts and stir continuously until the syrup has crystallized around the walnuts. Pour onto a baking sheet covered with parchment paper and let cool. Garnish the cake.