1970s Speedometer cable, 75' eldorado

[_Cap_]

I have bought 2 speedometer cables for my 75 eldo, lower speedo cables, from the trani to the reduction gears in the cruise control servo
And both have been too long have have tour themselves in half within one drive.

Both cables seemed top be a standard universal cable. at this point I'm looking into just making my own. Does anyone know the length for the lower cable or how to find it?
or if someone knows a good alternative with an actual proper length cable, please let me know