Cooks in 1978 baked this cake when they had over ripened bananas,it was the perfect way to use the bananas.When you eat a piece of hummingbird cake, you would hum like a hummingbird because it is so good.
This cake is a southern delight that gives you the essence of the tropics with it's bananas and crushed pineapple. Restaurants from the east coast to the west coast have made this delightful cake for it's southern customers.
All recipe for this cake is always the same with every baker.only thing is...how you pan it.
Here is the 1978 recipe
Mrs. Wiggins' recipe 
3 cups all-purpose flour
2 cups sugar
1 teaspoon salt
1 teaspoon soda
1 teaspoon ground cinnamon
3 eggs, beaten
1 1/2 cups oil or 1 cup oil for your choosing just for texture
1 1/2 teaspoons vanilla extract
1 (8 ounce) can crushed pineapple, undrained
2 cups chopped pecans or walnuts, divided
2 cups chopped bananas
Combine dry ingredients in a large mixing bowl; add eggs and salad oil, stirring until dry ingredients are moistened. Do not beat. Stir in vanilla, pineapple, 1 cup chopped pecans, and bananas. Spoon batter into 3 well-greased and floured 9-inch cake pans. Bake at 350 degrees F. For 25 to 30 minutes; remove from pans, and cool immediately. Spread frosting between layers and on top and sides of cake. Sprinkle with 1 cup chopped pecans. Yield: one 9-inch layer cake.
Cream Cheese Frosting
2 (8-ounce) packages cream cheese, softened
1 cup butter or margarine, softened
2 (16 ounce) packages powdered sugar
2 teaspoons vanilla extract
Combine cream cheese and butter; cream until smooth.Add powdered sugar, beating until light and fluffy. Stir in vanilla.