[MaSnaka]

Jac, My guess is you need a smaller size to fit proper. The rack is splined or had a "D" shaped end correct? The tightening of the u-joint is just to keep it from sliding off, not to keep it from spinning while trying to turn the wheels. I would call for help from the maker of your shaft. I just don't think your steering column is something you want to be thinking about while turning hard at speed. I'm sure you agree. Hope this helps you. Good luck John