Heat oven to 350 degrees. In large bowl, combine evaporated milk, pumpkin, eggs, sugar, cinnamon and salt; mix well. Pour mixture into greased 9 x 13 x 2 pan. Sprinkle with dry yellow cake mix; drizzle with butter and sprinkle with nuts. Bake 50 to 60 minutes or until toothpick inserted in center comes out clean. Serve with whipped topping. ----