Probably right it's a description mistake or if they're trying to pass it off as an L72, has incorrect parts and is/was an L36 car at best..
Just the L72 and build sheet statements got my attention..
Wouldn't it be something if true and the importance of an L72 '67 car hadn't been given proper notice?!
And in a Biscayne too!.
Although a few possiblities over the years have appeared worth investigating further (incl. '67 Canadian Chevy powered L72 Ponchos), the '67 Impala L72 story and saved 'Special Order' tag presented by the ex GM employee here a few months ago seemed the closest thing to reality I've ever seen/heard of?.
~ Pete
