6.1 Venting or no Venting

Rat Patrol said
Two lines from the intake to a puke tank with breather.

intake to catch tank to rear right of intake? so engine sucks out of the catch can ( which has a breather on top )?

i do currently not much. just a hose where the engine is breathing out ( and IN probably too ) to a catch tank with breather.

Do I need a breather on the oil filler side ( opposite side ) too?