'68 Barracuda Notch

CA 3014 I think is the Pioneer part number for the correct speedo cable, but you will need to find a way to swap the grommet over...I found that part number on Bouchillon's website, but the part is available at chain parts store. Now, if you decide to swap over to an aftermarket speedo with a threaded connection as opposed to a quick release, I think I wound up buying one that cross referenced to a mid-60s Nova...but it worked.

That appears to be the correct fitting, but its 80" long instead of the original at 63". I can't seem to find a new unit in the correct length.