Just added 1" wider front rims, no worries about the rear. width on front is more important than rear. Already have wide front rims? remove front axle, splice in 2" in the center and add longer tie rod tubes, not too hard to do!
On the fender mods I think they want to see is the seat area to be cut out and material added back in on the sides and welded back together to look like it was made that way. What they don't want to see is the fender cut out in the seat area and dropping the seat in the hole without filling it back in . Very clear pictures in rule book on what they want to see, you just have to apply it to your application