THE CAKE: Sift the flour, baking powder, soda, pumpkin pie spice and salt together; set aside. Beat the eggs until flothy; add the sugars. Beat until very thick. Stir in the pumpkin and oil, until smooth. Blend flour mixture thoroughly into the creamed mixture. Pour into a greased and floured 25 cm tube pan. Bake in preheated 180ºC oven for about one hour or until cake tester inserted near the center comes out clean. Cool for 10 minutes before removing from the pan. Cool completely on a wire rack. Drizzle the glaze over the cake. THE CHOCOLATE GLAZE: Melt the butter and chocolate, in a small saucepan over low heat; stir in salt and vanilla. Add the confectioners' sugar with enough milk to make the glaze thin enough to drizzle over the cake. Note: This cake will keep well for several months in the freezer. ----