Just such a wide-open question: "How hard...".

To me, the max tire size is just too small. Visually. Strut design interferes with changing that. I think anything modified would look worse but I'm not sure. The length of the wheel opening has to stay same, but it's height could take a major drop. Hmm. If you're wanting something molded on, I pass. If you want to cut up some fenders and see what can happen, I'm in for coaching if needed. Tempted to photo-edit the idea.