Beat eggs with 3/4 cup sugar.
Mix remaining 1/2 cup sugar with cornstarch; add to egg mixture.
Fold in bourbon, butter, walnuts and chocolate chips. Pour filling into unbaked 9-inch pie shell.
Bake in preheated 375° oven for 15 minutes.
Reduce oven temperature to 325°; bake 15 minutes, or until filling is set and crust is golden.