PCV or Breather caps???

Wonderful Hot Rod !

In defense of the previous owner, he may have read an article from Hot Rod.
Quote:
Venting a typical V-8 engine isn’t a complex affair. A breather atop each valve cover is usually all that’s needed. Of course, replacing one with a PCV valve to introduce a bit of vacuum into the system and to redistribute the unburned hydrocarbons back into the engine via the carburetor or throttle body yields a cleaner and much more environmentally friendly solution.