CRUST: Beat Flour, 1 cup butter, half cup sugar and salt until mixture resembles crumbs. Heavily grease bottom and sides of 15 inchx10 inch baking pan at least 1- half inch deep. Press mixture firmly into pan and bake at 180ºC or 20 minutes. FILLING: Blend eggs, corn syrup, 1- half cups sugar, 3 tablespoons butter and vanilla. Stir in chopped pecans. Spread over hot crust. Bake at 180ºC or 25 minutes or until set. Cool, cut into bars.