Preheat the oven to 425 F. Beat eggs in a large bowl. Stir in the pumpkin, evaporated milk, sugar and spice. Pour into the unbaked pie shell and bake for 15 minutes. Reduce temperature to 350 F and bake for 40-50 minutes or until teh pie looks firm and the crust edges are slightly browned. Let cool completely, for at least 2 hours or overnight in the refridgerator before serving.