Combine the corn syrup, eggs and butter and whisk briskly.
Add the brown sugar and mix well.
Add vanilla,bourbon, salt and pecans.
Pour the mixture into the pie shell and drop in the chocolate pieces.
Wrap a piece of foil around the edge of the pie to help keep the crust from over browning, and place in the oven on a small sheet pan for about one hour until the filling is set and the top is golden brown.
Best served at room temperature or warmed slightly in the microwave.