Upon its introduction in 1964, Ford Mustang was incredibly successful. Ford Motor Company sold over two million cars in less than two years. The marketing strategy of flooding the newspapers, magazines, and TV with ads did work. The design and the mechanical characteristics of the car were also fantastically popular.

However, the fascination of the public with the look, power, and speed of the Mustang started to fade by 1971.

Ford Motor Company redesigned the Mustang for the first time in 1967. The car became two inches longer and 2.7 inches wider. The 2+2 body received a new roofline that extended from the header of the windshield to the back of the trunk lid. Generally speaking, the 1967 Mustang looked like the car everybody fell in love with in 1964, just a little bit updated and bigger. It was very smart on part of Ford Motor Company not to mess too much with the design and features of the car that was already so popular.

Shelby also kept producing and updating its line of Mustangs. Dealers have complained that early Shelby Mustang models were very powerful and expensive, yet looked too similar to their regular counterparts. They were also not happy about the fact that Shelby Mustang had a lot of expensive high-performance parts that were not easy to get and replace.

The dealers were really happy with 1967 and 1968 Ford Shelby Mustang models. The models looked different from regular Mustangs, yet had a lot of identical inexpensive mechanical parts. Shelby used fibreglass and tail lights in a very intelligent way, creating a car that looked longer and different. He also added inboard headlights, which is why 1967 and 1968 Shelby Mustangs looked like expensive exotic race cars.

Even though there were a lot of improvements, the prices went down compared to the previous models, which made both the dealers and the public, happy.