76 K10 Detent Cable Length

[K10Chase]

I have a 76 K10 350/350 and noticed a leak where the detent cable bolts to to the trans. Prior to this I had replaced the cable a few years ago, but noticed a lot of slack in it even after being adjusted properly at the carb. It never really functioned properly after that. I figured if I need to remove the cable again to fix the o ring, I might try to get a shorter detent cable. Does anyone know what the length would be or a rough estimate? I think the one I have now is universal which is why it is longer.