I have seen factory PCV setups with the vacuum to the valve cover. Where is the engine air intake?
Others pull air into the valve cover with the vacuum line being connected where the original draft tube is.
Is there any advantage as far as which way the air is pulled through the engine?

Thanks

"Do not walk behind me, for I may not lead. Do not walk ahead of me, for I may not follow. Do not walk beside me either. Just leave me alone, you're starting to freak me out."

1957 GMC 150