Originally posted by westcoaststyle
It's more about keeping the vacuum flow going...
I read somewhere while researching about my oil catch can that by not attaching the valve cover breater to your intake, you can actually cause problems with your piston rings sealing correctly.
What's the harm in putting a tube between the intake and the valve cover? 
h:
my engines ran perfect for 40k miles like this... its at 125k now.. :dunno: maybe if im bored ill swap iit back :chuckles: