Preheat oven to 350°. Grease a 13x9-in. baking dish., Drain pineapple, reserving 2 tablespoons juice (discard remaining juice or save for another use). In a large bowl, beat eggs, carrots, sugars, oil, drained pineapple and reserved juice until well blended. In another bowl, whisk together flour, baking soda, cinnamon and salt; gradually beat into carrot mixture until blended. Stir in walnuts. Transfer to prepared dish., Bake until a toothpick inserted in center comes out clean, 35-40 minutes. Cool completely on a wire rack., For frosting, in a large bowl, beat cream cheese and butter until smooth. Beat in vanilla. Gradually beat in confectioners' sugar. Spread over cake.