Melt caramels and 1/3 cup evaporated milk over hot water or in microwave, stirring every thirty seconds. Keep warm.

Mix the cake mix, margarine and 1/3 cup evaporated milk and beat well. Spread 1/2 the batter in a greased 9x13 inch pan. Bake for 6 minutes at 350 degrees. Cool about 2 minutes. Spread caramel mixture over baked layer and sprinkle with chocolate chips. Stir 1/2 cup nuts into remaining 1/2 of batter and drop by half teaspoonsful over top. Sprinkle with remaining 1/2 cup nuts. Return to oven and bake for 18 minutes at 350 degrees. Cool in pan and cut into 1 1/2 inch squares.