[Power Surge]

Well, technically, there are no "65" 427 cars. They were 66 and 67 model years, even though the first cars were built in 65.

Many changes didn't have so much to do with the model year, but rather the time the car was built or sold. Some S/Cs were built in 65, but sold in 67, and some items could have been changed by Shelby as the car sat there.

The rule of thumb on the 427/428 change, was that street cars from 3200-3300 got 428s standard with an "option" for the 427, and then they went back to 427s on the last bunch of cars.

It might be easier to list any changes if you let us know what type of 427 car you are asking about (S/Cs or street cars).