Yes, I posted Andrews thread instead of the link to his site.Umm...there is a vendor with an ad,right side of your screen,5th ad down,that sells sprockets and disc brake hub adaptors that allow you to run both drive sprocket and disc rotor/caliper on the left side. Kings sales is the name.
That is the best option. Get a Shift kit, and you won't have to worry about any of that. Plus you'll be able to shift your gears..get a sbp hd jackshaft kit I installed one on my chopper it has disc brakes.
Gary