John,
I thought the PCV might not be required "down under". IMHO the road draft tube on a 235 looks like a kludge.
Your right "for an early vehicle, especially a Hot Rod." is unnecessary. As mentioned the PCV system does burn the fumes in the crank case eliminating some of the build up of crud.
Your partially right again the PCV "didn't come out till the 60s here (from factory)". I worked at an approved SMOG station, the owner was certified. The PCV law in Calif. was retroactive till 1952, but only required if you were going to sell the vehicle. I've often wonder why it wasn't part of the smog check. Perhaps because it was required so early.
Larry
