Jbyrd
I have widened and re-curved out my rear fenders about 1.5 inches. I did that so that I did not have to narrow my rear 56.5 and to ensure the 10 inch rims cleared 295/50/15. The Streetbeast body has more of street style quater panel and so it does not have the S/C style lip or flair.
As far as the filler relocation - I have seen it moved before on our cars. Both to the fender and to the center of the body just behind the center of the driver and pass.
If you do find a pattern let us know
Beastly