The purplesage link has some excellent info on TV cable. Not that much on speedo. In fact, I wanted to try to do my own TV but Bowtie overdrives has such a nice linkage I went with it. Thanks for the link.

The speedo has the mech. outlet and my outer cable housing hooks right up. I don't think something is right. I thought the cable looked like a D on the end for a 700r4, while mine is a very small square. I went to the junk yard today to find the D shaped end to fit to mine to make it work but when I got under a 3rd gen camaro like where my trans is from I saw it has the small square like mine (after I passed over the late models with elec speedos '95) Did my trans rebuilder put in a different drive gear? Let me hear any possibilities.