Combine and mix well the following: cake mix, nuts, 1/3 cup evaporated milk and butter. Press half of this mixture into the bottom of a greased 9 x 13" glass dish. Bake at 350 degrees for 8 minutes. Melt caramel candies in the top of a double boiler with 1/2 cup of evaporated milk. When caramel/milk mixture is well mixed, pour over baked mixture. Cover with chocolate chips. Pour rest of cake dough on top of the chocolate chips and bake for 18 minutes at the same temperature. Let cool before slicing. ENJOY!