i'm about to change mine out too and saw that looks like i have the 2 piece cable. Figured i would have to change to a one piece. Mine (72 Demon) is also going to stock instrument gage and 727 tranny (has 1" nut connecting to the trans).
I am also confused which to get. I don't know if I need the 80" length vs the 62" from Classic Industries. Also worried that the threads may not match to the transmission. Here's what I am seeing: