I went to fab valve covers on my 408. I took my valley cover, cut-off the knock-sensor ports, and blanked them off with aluminum. I've got a 90 deg bulkhead fitting with -10an thread looking out from the back behind the carb (with a baffel on the underside of the fitting). I've made up a -10an hose, female x female, to run back to the firewall. Question is:
Does anyone know where I can get a breather element to screw in to the hose?

Basically I'm looking for a breather with a -10an thread

 

This is a mod I thought about doing but with a -10 male fitting welded to the valley cover. Then I would just run a -10 hose fitting and line to a remote breather tank.