Cars made before September of 1964 are considered 1964 1/2

1964 1/2 models included only the convertible and coupe

Fastback was introduced in the 1965 model year

Carroll Shelby introduced his GT-350's in fastback model (six convertibles exist from '66)

Engine options were:

• 260 V-8 (early)
• 200 Six Cylinder (4 lug wheels)
• 200 Horsepower 289 (C-Code)
• 225 Horsepower 289 (A-Code)
• 271 Horsepower 289 (K-Code) (aka Hi-po 289)

1967 through 1968

Shelby GT-350 was joined by the GT-500 (big block) in this era

Shelby also added a convertible to his offerings

Largely due to consumer outcry started in Hot Rod magazine, a 428 was added in 1968

428 Cobra Jet was a success and one of the fastest things on the street

You could order a Mustang and have the dealer put a 427 into it

The age of the "Specials" arrive: California, High Country

Mach I is introduced

Boss 302 is introduced

Boss 429 is introduced

Shelby's get completely civilized, Shelby himself turns the program over to Ford

Body styles increase: Sportsroof, Coupe, Grande, and Convertible

Options go ballistic: GT, Mach, Boss, Grande, Specials, etc. etc. etc.

Boss 429 and Boss 302 are replaced by Boss 351

429 is normal engine option

Shelby Mustangs are no more

The age of the classic Mustang is drawn to an end