By law 52 and earler automobiles don't require SMOG, so your are probably going to have to "roll your own". Since you have a flat head the trick might be to finding a spot above the pan, near the head to vent the crank case vapors to the carb or intake manifold. What PCV valve to use is another good question. Are there any flat head 8s made after 52(?) a PCV for one of them would probably be a good choice. btw of all the SMOG equipment a PCV is the only positive one, so a licensed SMOG Tech told me once. As to the electric pump, I'd get a good rebuilt mech. The thump, thump, of the electircal, when I turn the key on disturbs me.
Larry