a new second generation mustang came out in 1974 called mustang ii and was based on the ford pinto, although far less than the original car had been based on the falcon. this new car was almost the same size as the original car, but emissions controls and the arab oil embargo meant that the mustang ii was not a very powerful car. 1974 was not only the first time ford had built a car which looked like an older model, it was also the first american car to be built on the metric system. the short, low hood meant that neither the inline six-cylinder engine nor v-8 would fit, so engine choices were changed to a 2.3 liter four-cylinder engine built by ford in brazil and a more expensive v-6 engine built by ford in germany. a 5.0 liter v-8 engine was offered in 1975 which meant that ford engineers had to redesign much of the car to make it fit. no matter which engine was used, the mustang ii was a heavier car than the 1964-66 model.