Wilwood calliper clearance

Hi All, can anyone please advise on what i can do to overcome the calliper clearance issue i have with both 13” & 14” wheels.Both sets of wheels are touching the outside of the callipers so i'm guessing i'll need to use spacers but not sure what depth i'd need to get or if there might be another option….your advice would be much appreciated.

I have 16" rims to clear my 280mm Wilwood 4 pots.
I believe that the 256mm versions require 15" rims for clearance, although some 14" rims will clear depending on the dish style. Perhaps a spacer might work depending on where it is catching and if it does not cause you wheels to poke out of the arches.