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
![](/ubbthreads/images/graemlins/scope.gif)
I use two twistin and two pushin breather caps, not the twistin non breather cap like your using now
![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
I have a set of those valve covers your using on another street motor I have, I'm using a PCV valve on it
![](/ubbthreads/images/graemlins/1343795-scratchchin.gif)
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
![](/ubbthreads/images/graemlins/shruggy.gif)