I'm confused.

dibbons said
Has anyone seen or found any official Chrysler Corporation literature, advertisement, or commercial using the 'cuda' reference before the '69 model year? Radio commercial:View attachment 1715263693
1964 Barracuda advertisement - Bing

Here is an ebay sale of an advertisement sheet for 1967 that went out to dealers to create a newspaper add.
plymouth ad slick oe baracuda cuda 383 340 dealer poster vintage rare 67 | eBay