blowby, how much is too much?

Thanks for the suggestions. It is a mazda MA 2.0 that does not have an air pump or reed valve, only a check valve from the anti-backfire valve to the exhaust manifold. Im thinking a valve guide might be the ticking but cant imagine that much blowby from an intake valve guide. Rings and head gasket together are under 50 so it may be a weekend project. That way i can look at the valves too. Pcv is good.