I have been meaning to do this for awhile now, but after several NOS cables sold on eBay recently, I thought it was time.
There have been several iterations of the E3SZ-14300-A (Motorcraft WC-8540) positive battery cable since these cars rolled off the assembly line. I have attached pics of each version from my personal collection of parts.
The original cables had more of an angled terminal cover with POS lettered in white. The convaluted plastic tubing was taped at the end with the black "cloth" tape. The Engineering part number was also printed on the cable itself "Motorcraft E3SF-14300-AB". The part in this picture was the original cable on my '86 CP.
The second version to be used was close to the original with the angled terminal cover and the tubing was taped with cloth black tape, but the Engineering part number was printed on a label and taped to the cable. This style was the version that sold on eBay recently.
The third version, what we commonly see on "restored" cars in the show field today, has a more rectangular terminal cover and the tubing is taped at the end with vinyl black tape. This particular part was made on 10-05-99.
With the latest version, the service part has a rectangular terminal cover with an end around the cable. This particular part was made on 06-15-05.
While the third and fourth versions are correct service parts from Ford, they are not "concours" correct.
I hope this helps and I welcome any discussion on this topic.