Passenger side valve cover breather removal?

Hi folks Im trying in vain to remove my passanger side breather and replave it with a KN push in one and I can get the old metal breather out..
Are these not removable or their some trick im not getting?

1971 LA 318

Thanks for the time.and advice.

 

Thank you.

I pulled that sucker out an installed my KN, Looks t!ts an no more sucking unfiltered air.




Thanks again.