In a large bowl, combine: flour, salt, baking soda, baking powder, cinnamon, ginger, and allspice. Whisk until combined. Set aside.
In a separate bowl, add white sugar and oil. Mix until creamy.
Add in the brown sugar, vanilla, and eggs one at a time, beating after each addition.
Add the dry mixture into the wet mixture and stir until just combined.
Fold the grated zucchini into the batter.
Pour the batter into greased and floured loaf pans.
Bake in pre-heated 325 degree oven for 50-60 minutes until a toothpick comes out clean and tops are puffed and golden brown.
If you are using mini-bread pans, check for doneness at 35 minutes. Mine were done at 45 minutes.