Don't have any idea on this modification (there is a surprise
Mustangs Plus was cutting a 67-68 steering column the other day in prep for a video on the conversion (think they were using the same system)
Might want to check their web site or call the store and ask for David. He and Mark were working on it two weeks ago.
Believe that there has been numerous discussions like what your asking over on VFM - a much better place IMHO to some experienced readers