Testfit one of those wheels on your truck so that you can see where it's gonna sit in relation to your fenders. Do this on the front and back. And remember that your tire will stick out .5" - 1" past the wheel.

Do this before you have tires mounted onto those wheels, just in case it's not what you expected.

 

I will stick one on there when i get home from work. I found a truck just like mine on here with the same wheels and 285-75s. I didnt look like they stuck out at all.
http://4wheeldrive.about.com/library...is_Newhart.htm
Check out that truck, It has the same backspacing as my wheels.

 

Do you have the fender flares like the truck in the picture? - that adds about an inch or so to the width of the fender.

 

No i dont have fender flares, But im probably goin to have to get them to make it look better.