One important task when turbocharging an engine is to recognize the potential that pressure may develop in the crankcase if measures are not taken to vent the crankcase beyond what is normally accomplished by the PCV.
When you add turbocharging you add positive pressure to the intake manifold, which by its very nature eliminates vacuum from the intake, which prevents the PCV from being able to vent the gases in the crankcase.
One solution to consider is to add a line from the crankcase to an oil catch can. This is often done in lieu of the PCV. The reason for this is that in order for the PCV to work effectively, it needs vacuum.
Here is a pic of a push-to-connect nylon line where the PCV used to be that is connected to an oil catch can.
The same is true for the valve cover, it needs to be able to vent pressure and the best way is to connect a line to a catch can as well. Here is a pic of a push-to-connect with a nylon line on it as well.
[Reference to using smaller line removed ....]