Did i damage my 727

I have read good things on that cable and shorter does make sense so I ordered the size and type your referring to, of course mine is a TCI fast gate shifter but they all really similar so I'll try it and report back, I also am taking this opportunity to upgrade tranny pan as well so I will report back. Also what size hole u have cut in your floor 1"? Also I know it's a lot to ask but do u have any pictures ? Thanks for the help as well

No pics sorry.
1 inch hole for the cable sounds about right. (Just enough to get the cable through)
PS. I just looked at the fast gate cable and it looks exactly the same as the B&M race cable.
You might need to make a sleeve for the pin on your shifter so the cable eye fits, or possibly drill the cable end eye out.
Hopefully neither and it just fits.