You can buy a rubber grommet that will fit into the valve covers for the PCV valve that will allow you to run another pushin breather cap like your running now, I do that on my race motor running E85 I use two twistin and two pushin breather caps, not the twistin non breather cap like your using now I have a set of those valve covers your using on another street motor I have, I'm using a PCV valve on it If you want I can verify which rubber grommet I used to make the stock Mopar PCV valve fit into those valve covers. I probally have one of those in stock