Need help on Turbocharging a 318

I'm not sure on the plugs but from my limited experience my own personal build THE Drain line HAS TO BEABLE TO FLOW AS MUCH OIL AS POSSIBLE if not you will push oil into the turbo!!! I had a 8an line which is 1/2 and that wasn't enough I ended up putting a 10an or 9/16 line and haven't seen one drop of oil or any sign of smoke also I would advise on using a 1/2 threaded fitting
You can try it how ever you want its your build but if you want to save yourself alot of headache down the line do it this way