Slant edge valve cover question

[GTTRacing97GTS]

Picked up a set of slant edge valve covers but will be running a catch can setup with an lines. The covers are powdercoated so thought I'd see if anyone knows of any an adapter fittings for the existing breather holes.

 

[RAU03MACH]

take a picture
they are all not the same

 

[GTTRacing97GTS]

This is the valve cover. Inside diameter of that grommet looks to be 1"

 

[Musturd]

This is the valve cover. Inside diameter of that grommet looks to be 1"View attachment 37160

They make fittings that will press into the rubber grommet . Or you can get them welded on .