I believe that the M-6007-A50SC Aluminator part number uses mostly 2011-2014 Mustang components (aside from the rotating assmbly with its lower compression), but your best bet would be to call us directly at 1-877-578-2433 so we can verify the year fitment, find a 2.9L Whipple that will fit, and figure out what kind of clearance you'll have on your 1966 Mustang.