The XC Falcon saw a slight change to the grill and side turn signals. Where as
the XA and XB had vertical bar turn signals on the sides of the fenders the XC's were changed to horizontal. A side turn signal
was also added to the front fender. When building an Interceptor out of an XC those corrections have to be changed
in the sheetmetal. You can see the horizontal turn signal in the picture below. The tail lights stayed the same.