Ford Mustang {First Generation}

1964 - 1966 The original pony car. Originally unveiled in April of 1964, the Ford Mustang would end up being one of the most recognizable cars in America, if not the world. Originally available as a hardtop coupe or a convertible (with the iconic fastback varient becoming available in 1965) the first iteration of the Ford Mustang could be had with either an inline 6 or a 289 cubic inch V8 engine. In 1965, Shelby would introduce their high performance varient of the Mustang, called the GT350, which was lighter and handled better than the standard model, being meant for road racing. As a testament to the Mustang's popularity, by the end of 1966, Ford had sold almost 1.3 million Mustangs.

If you want an example of just how beloved these cars were, and still are, you've only gotta look towards the Big D himself.
Overlord

Which one did Dunkelzahn own? A 1964 convertible, right?
Don Trog

To be specific, a cherry red, 1964 GT convertible. 289 V8 with a 4-speed manual transmission.
Speedtrap

A 1965 Shelby GT350

A 1966 Mustang Fastback

1967 - 1968 Starting in 1967, the Mustang would receive its first major update, becoming a bit larger in order to be fitted with Ford's new 'big block' V8 engines. As such, you could purchase a Mustang with a 390 cubic inch V8 or even massive the 428 Cobra Jet motor. If you preferred a smaller, less thirsty (or less heavy) V8, you could still get a 289-powered car, or you could try out the now legendary 302 cubic inch V8 motor. The Shelby Mustangs of this time would receive similar updates, with the GT350 receiving a hotter version of the 302 and the venerable GT500 making its first appearence, powered by the firebreathing 428 Cobra Jet. Cementing itself even further in American car culture, the 1968 Mustang would star in the movie 'Bullitt' being driven by Steve McQueen himself.

How's that '67 project coming along, Overlord?
Speedtrap

Coming along nicely! Did a major overhaul of the fuel system, so it can handle the high ethanol stuff.
Overlord

A 1967 Shelby GT500

A 1968 Mustang Fastback, driven in the movie 'Bullitt'

1969 - 1970 In 1969, the Mustang would once again go through a re-design, becoming longer and more muscular, with a more angular nose. These model years would have multiple performance varients, including the Mach 1, which could be bought with the 390 and 428 Cobra Jet big block engines, or the new 351 cubic inch small block V8. Aside from the Mach 1, there was also the Boss 302, a small block powered Trans Am racer, as well as the monstrous Boss 429, which was created to homologate the 429 cubic inch V8 for NASCAR use. 1969 would see the final year of Shelby Mustangs for the first generation, with the 1969 GT350 receiving a 351 motor as an upgrade from the 302.

A 1969 Boss 302

A 1969 Boss 429

A 1969 Shelby GT350

A 1970 Mach 1

1971 - 1973 The final redesign for the first gen Mustang, 1971 saw the car gain 3 inches in width in order to accomodate the big block 429 motor without an extensive redesign. Unfortunately, 1972 would see the big block engines scrapped due to tightening emissions regulations. However, the Mach 1 would still be available with the 351 motor up until its final version in 1973.

1972 onward would see the Mustang essentially crippled by the emissions regulations of the time, with the 302 and 351 making much less power and torque and generally being less responsive.
Overlord