Which Oil Filler Cap?

Ok, Let me ask a different question. Running a stock 318 with Mopar Performance valve covers and air cleaner, a PCV valve on one cover, which would be the appropriate oil filler (breather) cap to use?
Thanks,
C


Evening,
I have a set of Mopar Performance black valve covers on my 318. I need to get an oil filler cap. Show me what you have, please!
C