No, it's real. This is only the 2nd one that I've seen made in 1967. The other is a 7J30. The puzzling issue is that I have the GM memo stating that the 266's will be used until they run out due to a surplus. And the 266 shows up in all the early '68 Z28's until Jan 1968. I have not seen one of these early 467's in a car as of yet.