The 'cuda option in 1969 was available with 340, 383 or 440. They "generally" were lower-optioned versions with respect to interiors (generally basic interior, no fold-down rear seat) and wheel covers (poverty caps). They had the little non-functional hood scoops and hood stripes, as well as the blackout along the bottom of the vehicle.
The Formula S was available in 340 & 383 models, and "usually" had deluxe interiors, wheel covers. More of an upscale version, but as a rule, all Barracudas were upscale compared to the majority of Dart models available at the time.
Grant
