I guess I'm allowed to post this link...not sure if it breaks any rules, but check out
www.tiresize.com/comparison/
This is a cool tool with images to help you get an idea of what your set-up will look like.
I'm on bags with a small c-notch in the rear and cupped lowers in the front with Delmo inner fenders. 20x8 in the front with 4.5" BS and 20x11 with 7" BS and planning to run a 255/40R20 on the front and a 335/30R20 in the rear. I'm planning on tubbing the rear.