In a large bowl, beat 3 eggs until foamy,  add oil, sugar, zucchini & vanilla.   Mix well.  In another bowl, combine flour, baking soda, powder, cinnamon & salt.   Gradually add to the wet mixture, mixing well.  Add nuts &/or raisins, if you prefer them.

Pour batter into 2 greased loaf (9x5x2) pans.  Bake at 350* for 1 hour.