1965 Dart Gt 904 Trans Shift Cable Help.

66 is 1st year of a non cable shifted trans, why wouldn't any aftermarket cable work for a 904 ?
Thank you, and yes, 66 is the first year mechanical linkage. I have a rebuilt 66 904 which I would like to install in the 65 maintaining the 65 console shifter. What companies make the aftermarket cable/cables that could make this conversion. I have tried Imperial, Atlas Obsolete, Shumacher, and a few others, and they all no longer make these conversion kits. What companies would you advise to help with this conversion. Thanks for your time and input. I appreciate it greatly. Old Dart 66