Looks like the change was about Jan 66 at the plants. We can chance down the approx date at all plants in another thread if need be
Item #1- Identification - Passenger side rocker panel for coupe or fastback body
Application(s) - 64 1/2- through approx Dec 65/Jan 66 or 1967-69
ITEM #2Item #2- Identification - _____________________ (Identification - What is it? )
Application(s) - _______________________________ (Application - What year/years and models was it used on?)
Note - Not the wire but the body panel
Answer the questions and we can narrow down what the vehicle could be and what it could not be.