Prepare the Pie Crust
In a large bowl, whisk together flour, salt, and sugar. Add cold butter cubes and cut in using a pastry cutter or your fingertips until the mixture resembles coarse crumbs with some pea-sized pieces remaining. Slowly add ice water, one tablespoon at a time, stirring with a fork until the dough just comes together. Form into a disk, wrap in plastic wrap, and refrigerate for at least 30 minutes.Blind Bake the Crust
Preheat your oven to 375°F (190°C). Roll out the chilled dough on a floured surface to about ⅛-inch thickness and transfer to a 9-inch pie dish. Trim and crimp edges decoratively. Line the crust with parchment paper and fill with pie weights or dried beans. Bake for 15 minutes, then remove weights and paper, and bake for another 5 minutes until just beginning to color.Toast the Pecans
Spread pecan halves and pieces on a baking sheet and toast in the oven for 8-10 minutes at 350°F (175°C) until fragrant and slightly darkened. Watch carefully as they can burn quickly! Allow to cool completely before using.Prepare the Filling
In a large mixing bowl, whisk eggs until frothy. Add brown sugar, cane syrup, melted butter, salt, vanilla extract, bourbon (if using), and flour. Whisk until well combined and smooth. Stir in heavy cream and 1 cup of the toasted pecans.Assemble and Bake
Pour the filling into the par-baked crust. Arrange the remaining pecan halves decoratively on top. Cover the edge of the crust with foil or a pie shield to prevent over-browning. Bake at 350°F (175°C) for 45-50 minutes, or until the filling is set around the edges but still slightly jiggly in the center (internal temperature should reach 200°F).Prepare the Praline Topping
While the pie is cooling, make the praline topping. In a small saucepan, combine brown sugar, heavy cream, butter, and salt. Bring to a simmer over medium heat, stirring constantly. Cook for about 3 minutes until slightly thickened. Remove from heat and stir in vanilla extract and chopped pecans.Finish the Pie
When the pie has cooled for about 15 minutes but is still warm, carefully spoon the praline topping over the surface, allowing it to drip down between the arranged pecans. Allow the pie to cool completely for at least 3 hours or overnight before slicing.