In a large bowl, work shortening into the flour with a pastry cutter until the texture resembles meal.
In a separate, small bowl, beat the egg and add to mixture.
Add cold water and vinegar to mixture and stir until just incorporated.
Place dough into a zippered bag and flatten to about 1/2" thickness with a rolling pin.
Then place into the freezer for at least 20 minutes.
Preheat oven to 425.
Roll out the dough onto a floured surface and place in a pie pan. Trim off any extra edges.
To make the filling:
In a small bowl, mix the sugar, cinnamon, salt, ginger and cloves together.
Beat eggs in large bowl.
Add in the pumpkin puree, sugar mixture and evaporated milk. Mix until well combined and then pour mixture into pie shell.
Bake in preheated oven for 15 minutes then reduce temperature to 350 and bake for another 55 minutes or until toothpick inserted in middle comes out clean.
Cool on wire rack.