I run the BOV from the vac block with no issues. If someone could show a measurable reason why it should have its own port on the manifold I'm all ears.
The only thing I don't run from the vac block is the fuel rail pressure sensor and that's just because of proximity to an available port on the manifold.
'06 forged, GT3082R turbocharged, meth-fed Focus. 12.43 @ 115