For a 45 loader mounted on a 3010 with flat top fenders Deere made a hollow block to lift the fenders up about 3 inches and move them back about 3 inches. The block was made of two channels welded to make a tube. The ends were angled for better wrench access. There still wasn't much clearance between the loader arms and the lights when the loader was all the way up. I liked the higher fender position though.
Tightening the nut on the rear half of the U-bolt was a very slow process. You could only turn it half a flat at a time, flipping the wrench over each time. The loader tractor also was the corn picker tractor, so the fenders and blocks had to be removed every fall.