Good morning gentlemen!!
I have 2 sets of the above valve covers with an "0" punched horizontally on the lower edge of the covers. One set is definitely heavier than the other.
Can someone give me a bit of history on these covers?? What did the " 0 " signify??
One Googles and so much new non-vintage GM stuff comes up with the response(s).
Thanks in advance.
Ted
