PCV Elimination Plug

[79Poncho231]

The size of the GM OEM grommet is .940”.
I suspect the hole in the intake is slightly smaller.
That should get you close for an expanding plug.
View attachment 406768

If you decide to use a fitting in the grommet, it’s right at .500”.
View attachment 406769

Is that for the Intake ?

 

[1986 Buick GX1]

Is that for the Intake ?

Yes. This is for the intake (PCV valve).