I have a nice pair of "motion" style valve covers on my L78 motor. The holes in these valve covers are the standard 1.25 inch, however they have additional square notches set 180 degrees apart. I've found these to be a little leaky with regular grommets in them.
Does anybody have / make the correct grommets that will cover and seal these notches? I need one for a PCV (.75 inch ID) and one for a breather (1.00 in ID).
Any help is appreciated!
-Sam