[tbucketnut]

On my 64 with a 305E engine, this is the non california engine so there is no pcv but there is a crankcase fresh air filter on the driver's rear of the engine and the cylinder heads have the air valves that suck the emissions into the combustion chambers. My engine had a breather cap on the passenger side valve cover and I can smell blow by gases. I'm thinking this needs to be a closed system correct? I replaced the breather cap with a non vented oil fill cap on it and will see how it goes. Any comments will be appreciated because I have never seen this type of emission system.
Steve