Speedometer Cable ?

Why does AutoKrafters list three different lengths for a Maverick speedometer cable?
One is 63 inches, another is 66 inches, and another is 80 inches...

 

Well, they are lacking, Master parts lists four and that's just for '70-'72.


I'm trying to coax my W7 computer that has '73-77 records to wake up.

 

Reason I'm asking; I ordered a new speedo cable 12 years ago from O'reilly's. It was way too long. So I ordered another one from AutoKrafters or Melvins (can't remember which), and I don't remember the length, but the clip for the speedometer connection never worked. It's just pushed on there but not locked. I want to buy a good one but don't know what length I need.
It's a V-8 with C-4 trans...

 

Well after my 3rd cup of coffee the computer did wake up, I think problem was operator related.

 

Wow, all of them are shorter than the AutoKrafters offerings.
Melvins has 2 listings; 60" and 76".
'Looks like the 63" is gonna be my best option...

 

Probably use the 80" for Top Loader conversion.

Nothing anywhere near that length used in earlier models.