Preheat oven to 325 degrees. Grease and flour two 8.5 by 4.5 inch loaf pans.
In a large mixing bowl, beat the eggs well. Add the oil, sugar, grated squash and vanilla. Cream together.
In a separate bowl, sift together the flour, baking powder, salt and cinnamon. Add to the creamed mixture and beat until well blended. Fold in the nuts.
Bake at 325 degrees for 1 hour or until a toothpick inserted in the center comes out mostly clean and the bread has risen. This bread freezes nicely.