Moroso pvc grommet

I have the Moroso pvc grommet with the slit at the bottom.The valve covers do not have the baffles in them,The problim is my pcv valve is too small to fit in the hole,they say a GM fits,what can i do to make this work.Would the GM work in our mopar,the motor is a 360 almost stock if that helps.

this is more of a BTT for ya but what is the ID of the VC hole & what is the OD of the PCV