Pete,
Maybe you can clamp something in place (a exhaust U-bolt, or something along those lines. My car with 245/50-16s on it has about a 2.5 inch gap between the wheel arch and the tire. I want about 1.5 or so. I have no idea what stock is. Also, just as a caveat, I have no glass installed and some interior is still not in, but even if I get in the car, it makes little difference, so I doubt the door and hatch glass will. BTW, I'm running 225lb in the rear and 200lb springs up front.
Tim