In your photo, the pipe plug in the valve cover is where your suction hose for the PCV system will go. The other end will go to the intake manifold where the vacuum wipers attach. Finding original parts will be nearly impossible. The good news is you can find parts that you can use to make it work. The two ends are simply NPT pipe nipples with a hose connecting them. You’ll need to install a Y connector at the intake manifold to adapt the new PCV system into. The PCV valve could be installed in either end providing the direction of flow is followed. The tricky part is finding a PCV valve in the correct direction of flow (toward the manifold), that meters the proper flow of air so you don’t lose too much vacuum and enough so the system works. They make valves that flow in both directions. They are usually marked with an arrow as to direction of flow.
You must run a filter in that housing or every bit of dust that the PCV system draws in will be circulated thru your engine. Finding a replacement filter may be an issue. From your picture, I see holes in the bottom of the canister. I surmise the air would get drawn into those holes and then thru a filter, then thru the holes in the cap that gets clipped on top. If that is the case then a paper folded filter would not work. I suspect that it would be a more like the filter found in the original air filters where they use a media similar to course steel wool. After cleaning in kerosene, you would soak it in 30 weight oil, allow it to drip dry, them reinstall. Copper Or stainless steel scrubbing pads may be a suitable replacement.
You may consider changing to a conventional road draft system until you get all the parts needed to make your unique PVC system work. That way all you need is the road draft tube (Which is readily available on eBay) and a filtered oil fill cap on the valve cover, which you can find at you local auto parts store.
One more thing. Engines when you first start them up for the first time in years tend to smoke for awhile. You may find that the smoke dissipates a bit after being run for awhile.
