PCV in a Flathead. Looking for threaded PCV recommendations

[Kilohertz]

I bought a 4 bbl Offy intake for the 32-48 Flathead which has blocked off oil filler and breather holes. My plan is to drill and tap the road draft tube post to accept a PCV valve and I have read that the Fram FV306 or 294 are good matches for our engines. I can't seem to find a cross to a threaded version of the same PCV.

Anyone know what an equivalent to the Fram, FV306 would be, but threaded not grommet fit?


Cheers