Combine sugar, butter, extract and juice. Beat in eggs, one at a time until smooth. In a separate bowl, mix flour, baking powder and salt. Stir in the wet ingredients alternately with the milk. Add the lemon rind (or oil) and pecans (if using). Pour batter into a greased 4 1/2"x8 1/2" loaf pan. Bake for about 1 hour or until toothpick comes out clean. TOPPING: Dissolve sugar in lemon juice over low heat. Pierce top of hot loaf in several places with a sharp knife. Pour topping over crust. Let loaf cool in pan for 1 hour. Remove from pan, wrap in foil and let sit for 24 hours for flavors to mature.