Pecan Squares

CRUST:
3 cups flour
1/2 cup sugar
1/2 tsp salt
1 cup cold margarine

FILLING:
4 eggs
1 1/2 cup corn syrup
1 1/2 cup sugar
3 Tbsp margarine, melted
1 1/2 tsp vanilla
2 1/2 cup chopped pecans

DIRECTIONS:
1) In a large bowl, combine flour, sugar and salt. Put in butter, mix well until resembles coarse crumbs. Press firmly and evenly into greased 15x10x1 inch baking pan.
2) Bake at 350 for 20 minutes
3) Combine first 5 filling ingredients, stir in pecans, spread evenly over hot crust.
4) Bake at 350 for 25 minutes or until filling is set.