In a large bowl, combine pumpkin puree, sugars, salt and spices and whisk until very well combined. Add in the eggs, egg yolk and vanilla and beat very well. Add the sour cream and vanilla and mix again. Lastly, add the evaporated milk and whisk until very well combined. Pour filling into baked pie shell and bake at 325 degrees F for 45-50 minutes. Check at 45 minutes.