Stir sugar into melted butter. Beat in eggs. Stir in flour and salt until just blended. Add 1/2 cup lemon juice and one tablespoon lemon zest. Pour batter into a greased and floured loaf pan. Bake at 350 for 50 minutes. Remove from oven and cool ten minutes. Mix powdered sugar with remaining 1/4 cup lemon juice and one tablespoon zest. Remove bread from pan and pour glaze over top.