Let's talk PCV systems

[Brad54]

I've got a '62 Suburban, originally from California. It has a closed PCV system on the 283. This has a sealed twist-on oil fill cap, a PCV valve coming off the fill tube, and the crankcase vent at the back of the block.
The open PCV systems have a vented push-in cap, a valve and the vent at the back.
Have any of you guys bothered putting the valve back in, have you omitted them, are they gone/missing/cannibalized over the years? When I got my truck, the crankcase vent was running to the carb base, the port in the oil fill tube was bare and open to the atmosphere (allowing unfiltered air and dirt into the fill tube/engine), and the port on the underside of the air cleaner lid was also bare and open (allowing unfiltered air/dirt into the carb). I've tracked down all the parts and have restored my closed PCV system (even though I don't need it in Georgia). What have you guys done?
I kept the closed system, because I think it'll help keep the engine a little cleaner...it's not uncommon for breathers to eventually allow an oil film to develop on the engine around them.

Thoughts?

-Brad