Adjustable PCV and oil catch devices?

I have a blown mustang that I run an Ebay catch can with a homedepot compressor air water seperator before it goes into the intake and it works great.Mustangs had a problem even with out a blower with pcv valve in back of intake drawing in oil.Set up is a lot cheaper than 150 bucks.If you only have a little blow by I would think the separator would be enough.on deceleration my mustang sees spikes of up 25" of vacuum.