The Pvc helps vent the block and it will/should stop the oil from comming out of your breather.Also one other thing If there is no baffle under that oil breather you may still have oil comming out of it.Just because of oil splashing the bottom of it.
Just my 2cents.

Larry/Twisted6
[oooooo] smile
Adding CFM adds boost smile
shocked God doesn't like ugly.