Experimenting with different shift knobs leads me to believe your shift knob may be to big to fit without your front knuckles hitting the dash sifting into 3rd and 5th if you have a rear view camera installed. I elected to go with a momo knob that had a smaller circumference.
You can cut the Cableshift shifter shaft almost in half then re-die it. It allowed me a decent size knob plus quicker shifts. Nice build Cam. Who would ever think there would be dual Cam's on the GT40 blog?!