Sprinkle 1 tablespoon flour over the unbaked pastry shell; set aside.
Combine the syrup, eggs, 1/4 cup sugar, 3 tablespoons flour, salt, and nutmeg in a large bowl; beat at medium speed of an electric mixer for 1 minute. Stir in the peaches adn 1/2 cup melted butter. Pour the peach mixture into the prepared pastry shell.
Combine the pecans, 1/4 cup flour, and 1/4 cup brown sugar in a medium bowl, stirring well. Cut in 2 tablespoons butter with a pastry blender until the mixture resembles coarse meal. Sprinkle pecan mixture evenly over the peach mixture.
Bake at 350 degrees for 45 to 50 minutes or until the pie is set. Let cool completely. If desired serve pie with whipped cream or vanilla ice cream.