In a large bowl, beat egg yolks and sugar until creamy. Blend in flour, cinnamon, allspice and salt. Beat in buttermilk and melted butter. Stir in raisins.
Pour filling into pie shell.
Bake in the preheated oven for 30 to 40 minutes, or until filling is set.
In a large glass or metal mixing bowl, beat egg whites until stiff peaks form.