You mean closer to the strut, you're talking about the wheel offset. You may be able to tuck it in a little bit with adjusting the camber, but not much. What offset are the wheels you have +40 and above will sit closer to the strut (won't stick outside the wheel well), think our stock wheels are +38. The lower the number the more it will stick out (further from the strut), my AMG wheels are +46mm and tuck in the wheel well pretty nicely.
As for extended studs and that stuff I don't have any experience with.