Kingfisher, I have the same Ace valley cover. Ace told me that they don't install a baffle due to various lengths of pcv valves. I would think if you Loctite the screws or use high-temp epoxy, whatever baffle you use should be secure. I've also considered removing the sheet metal baffle from my original valley cover and tack-welding it to the Ace valley cover. Let me know what you come up with, including photo, and what pcv valve you're using.

Thanks.

See if these help.
FoMoCo 1958-1964 valley cover
  

Mummert valley cover with PCV valve


Mummert valley cover without PCV valve


Blue Thunder valley cover with PCV valve

Lorena, Texas (South of Waco)

I sorta hate to add another PCV question! There are plenty of threads and I reckon I've read most of them but can't quite find the answer.
I have an ACE finned valley cover to put on my 312 with a grommet and valve to suit. The cover comes with a PCV provision - a circular flat area ready to be machined out and 2 posts on the underside which presumably could be drilled and tapped to screw on a baffle (not sure I would be comfortable with the possibility of dropping a screw).
What configuration should the baffle be? I imagine something like Mummert's maybe, but I can't see a decent photo of his. Is it sealed on just 2 sides, allowing airflow in through the outer 2 edges? Or is another design better? And what about the large vertical baffle that the stock cover comes with? I gather it's not particularly necessary?
(It's interesting that they put a baffle below the filler though)
Thanks, Mark