Nope, no PCV until '61, when it was mandatory in California, optional elsewhere. In '62 it became mandatory in New York. In '63 it became standard equipment everywhere.
There was a bit of a name game: Chrysler originally called PCV "Closed crankcase ventilation", but then in '64 when California required both the inlet and the outlet of the crankcase to be ducted to the engine intake (breather w/hose to the air cleaner instead of just vented to the open air), that was called "closed crankcase ventilation" industrywide. That fully-ducted, really-closed system became standard equipment for '68.
