SD Rebel , It seems it wouldnt allow me to get my Radio Call sign  with the legacy black plate as it looks like they are 2 different plates,  amature radio plate  and black legacy plate  (  i tried to get just the black vanity plate with my call sign , and that didnt seem to work  either ) which is unfortunate as i think it would look much better with the black plate  . The  woman who worked for the Auto Club   told me they probably would not allow it , but she tried to imput it to the system  as a black legacy plate with just my call sign but it wouldnt go through  , much like it did for me when i tried to do it online  ( i put it in my cart , but wouldnt let me check out ) she said that i could call DMV just to check and make sure , which i will probably try in a few days.