In a medium bowl, add the flour, brown sugar, salt, and melted butter and mix well.
Press the crumbly mixture into the baking dish and bake for 25 to 30 minutes or until the crust is golden brown.
While that cools, add the eggs to a large mixing bowl and beat.
Next, add the corn syrup, white sugar, and melted butter and mix well.
Add the semi-sweet chocolate chips and mix.
Finally, add the pecans and mix until they are coated.
Pour the mixture into the baking dish over the shortbread crust and bake for 25 to 30 minutes or until the center is no longer jiggly.
Allow the bars to cool for at least two hours before cutting.