keep in mind the body arch lines on the fenders and boxside is different from teh 2011...

so while you could do the fenders your old box side wont have the same arch design as the 2011 fenders..

go have a look and you'll see the new style line introduced to the SDs in 20111..

 

Im sure he will also get a new take off box.

 

Yeap, you are right, I guess I'll stick with the 2010 model, seems its less complicated. In any case, I alrealy looked and 2011 parts seems that are not available yet and if they were most likely not at reasonable prices. The upgrade for me is worth every penny since I'm planning on keeping it for a while.