well ya got Chriss's version of what can be done,,,,Zach is in the middle of the rawhyde rallye and has a lot on his plate,,i'll see if he may have time to chime in now,,but for sure when he returns next week,,,in the mean time ,,
a few pics of your front end,,,
chris's concern about your 320 rotor,,i think that there are caliper brackets available that adapt your caliper to either 300mm or 320mm..,so a picture is worth a thousand words to me,,,you may check with Bike Bandit or Cycle Hut or one of the other KTM performance shops.
be patient,,,at least til i/we talk to Zach
woody