Tunnel for driveshaft for reg. cab s10 on 20's?

Do you have to tunnel the back of the cab for the driveshaft to clear on a regular cab s10 on 20's? Its gonna be really close when its layed out but i cant tell now because my 3 links not on yet. I dont mind doing it but i need to allow myself more time if im going to need to. Thanks for the help. Later