The top engine in 1966 was the same 289 HiPo configuration offered on the 1965 Ford Mustang, with the power remaining at 270 horsepower. The Mustang in these photos has the least powerful option ...

All the 1966 Mustang's engines were normally aspirated ... Ford also produced a Shelby GT-350 version, which began as a hi-po 289 Mustang but was sent to Venice, California, to be outfitted ...