Hey Man,
I just wanted to say your avitar pic is one B.A. lookin Bu!!! I'm not much of an expert or guru on wheel fitment but I'm assuming your 10"
wheel will carry the same tires? You have 1" tire clearance and are adding 1" back space I'm assuming you have more than 1" between the wheels and frame or you'll be rubbing metal on metal,generally I would think your same size tire on a 2" wider rim will bulge less and as
long as you have adequate rim clearance you should be OK but the only way you'll ever know for shure is to try it!! Good Luck!
Later,KillerDave