In a large bowl, whisk together eggs, then add pumpkin, full can sweetened condensed milk and approximately 2/3-3/4 can of the evaporated milk (you can use the entire can, I prefer a more solid pumpkin pie, thus do not use the entire can). Stir well to combine. Add in cinnamon, pumpkin pie spice, vanilla and salt. If adding sugar, stir in. Stir well to combine.