[PANAVIA]

so you may need things drawn from manifold vacuum.

1. Power Brake Boosters.
2. PCV valves

the middle one is used as PCV, the fitting on the corner can be used for a PBB.

if you are not using a PBB you can cap it off with a NPT plug.

I always advise the running of a PCV valve, it reduces crank case acids and keep unburned gasoline vapors from messing with things, like bearings.

--Steve