replacing Shimano 105 10 speed freehub body with ultegra

Hi everyone,

I am new to this forum and I am looking for some advice.

I have a Shimano 105 10 speed group set and my freehub is making a noise. I am wondering if I can easily upgrade the body only. I am considering going to a Ultegra 6700 body that is for 10 speed cassette. Is this a direct swap...