Which PCV valve to use with low vaccum

[BrianG]

Does anyone have a part number or reference to which pcv valve to use with a small block which has a big enough cam that it produces low vacuum at idle. I have around 10 inches of vacuum at idle in park. According to several artilcles that I've read, the PCV valve should limit its flow at idle where the vacuum is usually high (somewhere near 20 inches or so stock correct???). So, if I have only 10 inches at idle, my pcv valve thinks I'm in a partial wot situation and flowing much more freely that it should. I'm not the first to ask this same question, but none of the previous threads that I could find ever really answered this question.