you might be able to put in humbuckers, im not sure about fenders but i know ibanez"under the scratch plate" of H S S models they have a humbucker spacing which means all u might have to do is, get new scratch plate and put everything back on bt get a H S S one or possibly try cutting it out or getting it cut out

~DONT TRY THIS UNLESS U ARE CONFIDENT~ or get some one else to do it for you