Best if prepared with food processor:.Process dry ingredients about 10 seconds to blend. Empty into a large mixing bowl. Process nuts until chopped, about 6 seconds. Empty into a small bowl.
Using grater: Grate unpeeled zucchini, using medium pressure. Empty into a measuring cup and measure loosely packed.
Steel knife: process eggs with sugar for 1 minute. Do not insert pusher in feed tube. While machine running, Add oil and vanilla through tube. Process about 45 seconds. Add zucchini and process 8-10 seconds. Remove cover and add dry ingredients. SEE NOTE. Process 3 or 4 quick bursts, just until flour disappears. Sprinkle nuts and raisins over batter . Give 1 0r 2 more quick bursts.
Pour batter into greased and floured 9" by 13" baking pan, or 12-cup Bundt pan. Bake at 350 degrees for 55 to 60 minutes, or until cake tests done. Cool 15 minutes before removing from pan. Can be iced or glazed when cool, but it's great just plain. Keeps very well in fridge and freezes well.
NOTE: This amount of batter will nearly completely FILL the bowl of standard sized food processors, but probably not overflow. You can add zucchini mixture to dry ingredients in mixing bowl, Mix with wooden spoon until blended then add nuts and raisins, or dates.