Post up you pictures along with specs. Im lookin into 20x9 27mm wheels and I'm just trying to get an idea of how much they will stick out.
With those wheels the protrusion compared with the stock 8 inch rims with their 48 mm offset fitted with 245 tires will be:
-with a 245 width tire ... an extra 21 mm futher out
- with a 255 width tire .... an extra 26 mm further out
-with a 265 width tire .... an extra 31 mm further out
.......and so on.
You can easily measure this out on your car with stock 8" wheels and stock 245 stock tire size and see where the top edge of the tire will be with the new wider, low offset, 9" wheel.
The edge of the new rim itself will protrude out an extra 34 mm compared with the 8" rim because you are running a 27mm offset instead of 48mm and you have an additional half inch of rim each side of the wheel with the 9 incher ( 1/2 inch plus 48mm - 27 mm = 34 mm or 1.3 inches approx). This means the outside edge of the wheel rim itself will most likely sit right at or just beyond the outside the face of the rear guard.
Even with a 245 tire on the new wheels you are going to have to roll the rear guard lips on your car to get clearance in the rear.
If you are after a 9 inch rim I would not be looking at an offset any lower than +35.