Pre-heat the oven to 350 degrees. Grease and flour a Bundt cake pan.
In a bowl sift together flour, cinnamon, salt, baking powder, and baking soda.
In a large bowl beat eggs and sugar until the mixture becomes light colored. Mix in oil. Add sifted flour mixture to the egg mixture. Beat for 2 minutes. Stir in pineapple, walnuts, vanilla extract, and grated zucchini. Mix well and pour into the prepared cake pan.
Bake for 1 hour and 10 minutes or until a toothpick inserted into the center comes out clean.
Remove from the oven and allow the cake to cool for a half hour.
To make the glaze- In a bowl combine confectioners’ sugar and milk. Mix well. Remove cake from cake pan and allow to fully cool. When the cake is cooled pour glaze over the top.