1969 was the benchmark year for Ford Mustang in its proliferation of performance names and engines.
No fewer than six factory performance Mustang models were available (GT, Boss 302, Boss 429, Shelby GT350, Shelby GT500 and the Mach 1).
Additionally, seven variations of V-8s were available in the '69–'73 models; most of these also available in the new Mach 1.