Chevrolet El Camino
The 1975 models featured a new grill, providing a fresh appearance. Suspension upgrades offered a quieter ride, and radial-ply tires became standard. Dual remote mirrors, new twin sport mirrors, intermittent wipers, and cruise control were among new convenience features this year. The 1975 high energy ignition (HEI) provided spark to the spark plugs with minimal maintenance and increased power. The larger distributor cap also provided better high-RPM performance by decreasing the likelihood of the spark conducting to the wrong terminal. The 250-cubic-inch in-line six of 105 hp (78 kW) was offered as the base engine. The 454-cubic-inch V8, downrated yet again to 215 horsepower (160 kW), made it into 1975 as an El Camino option, but this would be its last go-around. It was not available in California, and the optional four-speed stick was no longer offered. Buyers could now choose an Econominder instrument package that included a vacuum gauge to point out when optimum fuel economy was being attained.
Source: Wikipedia, 2013