273 Commando PCV valve

Here is a couple for you. I also use a 316 stainless thin nut almost like the original chrome nut.

FOR SALE - Vintage Fram PCV 62-69 kit

Oil Filler Breather Cap w/ PCV Mount - Chrome - 64-69 Mopar Oil Filler Caps | AMD 337-1064-1C

Oil Filler Breather Cap - Small - Chrome - 64-67 Mopar Oil Filler Caps | AMD 337-1064-C