Isn't 'Cuda a model, not a nickname?

Referring to an A-body Barracuda, as a 'Cuda, is 100% correct. Why? Because that is PERIOD CORRECT slang for that car.
"Oh my '65 'Cuda isn't a real 'Cuda like your '70 is? Well I'll have you know my 'Cuda was roasting tires on the street and getting it's windows fogged up every Saturday night, long before your 'Cuda was even sketched on paper!".

The A-body 'Cudas set the standard and have every right to be called a 'Cuda. MOPAR just capitalized on it, very successfully I might add.

The "Cuda" moniker came in 69 from Ma Mopar and only for the Cuda model. There are 70 Barracudas and 70 Cudas. The Cudas were Barracudas (base model)but the Barracudas were never Cudas (performance model).

"The 1969 version of the 383 engine was upgraded to increase power output to 330 bhp (250 kW), and a new trim package called 'Cuda was released. The 'Cuda, based on the Formula S option, was available with either the 340, 383 and, new for 1969, the 440 Super Commando V8."