I have a 75 CB 750 that I am going to cafe, but it has single front disk brakes. I know they used to put dual disks on them back in the day and I have searched but cannot find the info. What disks, wheel assembly and master cyl do I need to use? I think they used to either swap the fork legs from side to side so move the caliper from in front to behind the fork leg. Any help would be appreciated.