BAFFLES FOR THE 318 VALVE COVERS - OIL LEAK

Confirm the width on your valve cover with the "standard" grommet. Lots of cast covers are closer to a half inch in thickness at the knockout and the grommet channel is too narrow to seat all the way.
Yup!
Thanks. I did see a few on the web that I will have to measure more, and maybe order.
Right now I'm hoping the NAPA one will seal for the time being.