Beasley's 76

I have a GM 350 HO crate motor that I've had installed for about 8 years. It came with the chrome chevy center bolt valve covers. I'm looking to purchase some aluminum valve covers, but I have a question. My current Tall valve covers has pvc and breather on passenger side and breather for driver side. Most of the valve covers I am finding dont have this setup, most have one breather for each side. My question is could i use the one hole on the passenger side for PVC and use one breather on the driver side? Will removing the breather on the passenger side have any effect?

rcread

PCV - positive crankcase ventilation.

You may either put a breather or an oil cap (aka "710") on side opposite of the PCV.

Gordonm

1 breather and 1 PCV valve. No need for the 2 breathers, unless you want to run just 2 breathers.