You do know the difference between a BOV and a wastegate?
That said: You can use both.
Put the BBC on your turbo and the BOV somewhere in your intake system.
What bov do you want? A bosch 110 bov will go where the stocker sits now.
If you want an greddy or hks kind of bov :
Leave the stock bov on, or remove it and plug the holes in the rubber intake hose and the 3k pipe( or get an adapter to connect the BOV to the 3K pipe and just plug the gap in the rubber intake hose.)