i removed the pcvvalve .instead piped the hose into the air cleaner so not going into the carb base. the fiting is past the air filter so does not plug the air filter'i use a after market air cleaner with a dry element. it al lhandels base pressure very well . just block the fitting into the holley carb

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!

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)

I had to remove the valley pan. I could see no other way to remove the "stud" without damaging the valley cover.

Yes, I misused the term "stud". It is a threaded insert for the hold down screw that is pressed in and spot welded from the bottom. I want to avoid pulling the intake if possible.

In my valley cover, there was a  "stud" that the screw would screw into.   this "stud a' was/is spot welded from the bottom side of the valley cover.  I removed the thing from the bottom side, then welded up the small holes where the spot welds were ( 3 of them ).  probably did not need to as they were very small, and there is a baffle there.  after this is removed a pcv valve and a rubber grommet can be installed directly into the valley cover with no problems. when I get back into town where my car is, I will try and take some pictures, if any one wants to see them.

Original was a screw, not a stud.  If it is simply a stud, then it should come out but if the previous owner used loctite to ensure that it doesn't move when tightened or even had a bolt welded to the bottom or something else, then it may not come out very easily.  


Lawrenceville, GA

any i seen juts screwed out from the top

I'm using the original valley pan, so it's baffled. I would just use a PCV valve in the hole with a grommet, but the threaded hold down stud for the breather tube is still there and in the way. It knocks out through the bottom and I don't really want to take the manifold off to remove the tray.

ive used them before to make a pcv setup.they are not that hard to find if your in an area with lots of old trucks junked.63 and 64 with a 2 bbl carb had them.not sure if they had any earlier.