You keeping the same struts? or going to upgrade to vtr/s ones for the bigger brakes? If you do that, You'll probs need to change both shafts anyways to match the bearing.
But I used a 1.4 quicksilver shaft on my drivers side on my VTR, which means no bracket in the middle.. however it worked for 2 months until i changed it for a VTR one with the bracket.