Pumpkin Crunch Cake

1 29-oz can pumpkin
3 eggs
1 can evaporated milk
1 C sugar
1/2 tsp salt
2 tsp pumpkin pie spice
1 yellow cake mix (your favorite brand)
1/2 cup butter

Mix together pumpkin, eggs, evaporated milk, sugar, salt and spices. Pour into a greased 13x9 pan. Sprinkle with dry cake mix. Melt butter, drizzle over top of dry cake mix. Bake at 350 degrees for 60 minutes, or until toothpick comes out clean.
Good warm or chilled.