I have an 89 GMC Jimmy with a 4" lift, 35's, dana 60, 14BFF, and bushwacker cutout flares. I used wheel adapters from wheeladapters.com. I used a 2.5 in the front and a 3" in the rear. Now my tires are even with the outside of my flares. It does turn wider but I like the look and the wider footprint. It also allows me to run 15" rims without having to grind my calipers.
make sure you use red loctite and torque them down to 125lbs.
The other thing to be wary of, is that it is not DOT compliant IF you have to do a vehicle inspection.