The '75 version of the MPC does not show a disk brake wheel for 65 or 66. But it does show a 15" wheel available for both 65 and 66, something I did not think was an option for the Mustang. While something that is over 6,000 pages is difficult to pull off without error, this is probably one more example of how errors can creep in over time, and why the earliest applicable MPC is generally the best.