What wheels/spacers? I have a feeling that's going to rub pretty bad. I have the same suspension and those tires in 285/70/18 on stock wheels, and I can't imagine going any bigger without running into issues. I test fitted that exact tire on mine with some Tundra wheels, and there was no way it was going to work.
They are the stock wheels. Hmmmm maybe I screwed it up. Argh