"On a B20, the breather on the block connects to the air cleaner (box if ya got one, or either filter if you don't). There should be a mesh flame trap in the breather fitting that the hose attaches to. The oil filler cap connects to a restrictive orifice on the intake manifold."

I'm not finding any fittings on the D-jet aircleaner. I do have 3 fittings
on the manifold, one with a small orifice (hooked to the oil filler cap)
one 3/8" hooked to the heater control system and one 1/2" hooked to the
brake booster with a czech valve. I also have a tee of some sort so maybe
one of these lines needs to be hooked to 2 items, i.e. maybe the brake booster
and heater control vacuum needs to be hooked together and the other one
used for the breather box (which does have a flame trap in the outlet pipe)??

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George Downs, Bartlesville, Oklahoma, Central US