That's the plan man! Just wanna get a rough idea how they'll look.
Currently running 245/40/20 front and 275/35/20 rear which I'm planning on reusing until I have money for some nicer tires.
The fronts for these wheels will be 20x8.5 and I'm not too sure if I should do 20x10 or 20x10.5 for the rear? Think the 10.5 would stick out past the fender much?
Sick looking rims. And agree with the fatter the better. Have you thought about a duck-tail style spoiler? I personally don't like the factory spoiler.
Well you don't want to go too wide in the back to cause some understeer. That is why the GT500 only has 285s in the rear. They matched the front tires to the rears to minimize understeer issues according to the SVT Engineers