66 Mustang was a very hot-popular when it was first released. It had many upgrades such as a cruise-o-matic three speed auto transmission or an automatic C4 transmissionThere was also the option of a long duration solid-lifter camshaft "HiPo" paired with a 1" thick vibration damper which eliminated the need to have a vacuum unit on the distributor and added to the base horsepower of the 289 engine. It also came with new adjustable rocker arms. Overall it was a great car, Ford sold over 600,000 of these.
67 Mustang took the next level. It back the first mustang that brought the major redesign. It was longer and wider. The wheel side was slightly bigger. It came with fist bigblock engine, an impressive 390 cubic inch 6.4L V-8 320hp. A GT350 package on a 1967 Mustang would include a K Code engine with a Cobra aluminum hi-rise and the GT 500 option was equipped with the 428 "Police Interceptor"
