Preheat oven to 425°F and place the pie dish onto a cookie sheet
In a large bowl, combine eggs, pumpkin, milks, salt and spices. Whisk until completely combined.
Pour the pumpkin pie mixture into the pie crust.
Bake for 15 minutes, then turn the oven down to 350°F and bake for another 50-60 minutes, or until the pie is set around the edges and a knife inserted near the center comes out clean.
Allow the pie to cool to room temperature before placing into the fridge to cool, 4 hours to overnight.
Topping
Combine the sugars, corn starch, corn syrup, butter, salt, and eggs in a medium saucepan. Stir until combined.
Bring to a boil.
Remove from heat and stir in 1 1/2 cups of the pecans (reserve 1/4 cup for garnishing) and vanilla.
Pour the pecan pie mixture into a bowl.
Let the mixture cool on the counter for 10 minutes and then refrigerate for 1 hour.
Once the mixture has thickened and the pie has cooled completely and set, scoop the pecan pie mixture onto the top of the pumpkin pie.
Sprinkle the remaining 1/4 cup of chopped pecans on top.