While oven is pre-heating place a baking sheet into the oven upside down on the middle rack. In small bowl, combine sugar, salt and spices; set aside.
In a large mixing bowl, whisk eggs until well blended. Whisk in pumpkin and sugar-spice mixture. Gradually whisk in evaporated milk.
Pour into unbaked pie shell. Place pie on hot baking sheet in the preheated oven.
Bake at 425° for 15 minutes. Reduce temperature to 350° and bake for 45 minutes or until firm around the edges and slightly jiggly in the center.
Cool on wire rack for 2 hours. Serve immediately or refrigerate.