Anyone ever try one of these adapters to use a PCV valve from the rear breather hole in the valley cover? Yes, it's a road draft conversion for a small block scruby, but it looks like it'll fit nicely!

In lieu of removing the hollow stud in that rear hole in the valley cover and especially for those cases where I might want to retain that hollow stud for restoration purposes, I have in the past machined a spacer that simply attaches to the cover with a ¼-20 screw or bolt where the original road draft tube attached.  Machining a lip at the bottom of the spacer allows it to remain firmly seated in place as well as allowing the oem gasket originally used for the road draft tube to be used.  A grommet and PCV valve are used in the newly installed spacer.  Here are some pics.
 

 

 
 

  
And here’s the link to the thread where this was originally posted.
http://forums.y-blocksforever.com/Topic142341-1.aspx

Lorena, Texas (South of Waco)

Now there's an idea. I have a lathe and I probably have some aluminum stock of the correct size. I may "borrow" that from you Ted. Thank you!