After a search on the internet helping a member to where the P/N tag with the Letter Code and the overflow clip is installed. Found these photos on a Chevelle site should help those who need some answers. The Codes and locations on the radiator maybe different but the install is the same. I should have added that the metal tag and clip were installed on 1970 to 1972 but in 1970 the overflow clip on the radiator was not used the plastic tie strap on the wheel well fender was used as in Terry's photos later cars 1971-72 used the metal clip the plastic strap was deleted. Also the metal tag the 2 letters may have ether white paint or ink to high-lite the code but it has been seen with and without the white.
Paul
Paul
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