The attached photo shows the "O" in a NOS L79 valve cover. Note that the "O" is half filled. I'm curious whether the half-filled "O" has ever been seen on known-original production valve covers, or whether it is something that appeared later in the service replacement parts. Anyone have an opinion?
1967 L79 valve cover casting flaw
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No flaw line or half-filled "o" on early service
Joe --- Bloomington, mid-80's, scored an NOS cover still in the GM box with yellow and black sticker. What year did the blue/white start ?
I see that '65 TIM&JG says no flaw or half-filled "o".
These covers must have been a high-volume service item for hot-rodders.- Top
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