The Ford Mustang grew a size for the 1967 model year. Also the car became more powerful with a 390 cid (6.4 litre) big-block option, which boasted some 320 hp, considerably more than the racy Shelby GT-350 had to offer. The power-output of the 1967 GT-350 even was reduced from 306 to 290 hp to comply to noise restriction regulations. Click here to read more.. »