dmfconsult: I got yor e-mail but can't reply directly right now. that's my home address and I'm at work. You know, firewalls and all.
If it were me, I would buy two new breathers. They are relatively inexpensive, $7 - $15, and I treat them like a wear part. They do fill with
oil eventually and they don't work as well after that. Mr. Gasket, Moroso, and any number of other manufacturers will have what you need. As far as a PCV valve goes one from a 79 mustang V8 has just one hose oulet (if I remember correctly) and will probably look the cleanest.