I have to admit, you had raised my expectations pretty high before I installed my 408. I thought I was gonna have a hard time keeping the car from spinning the tires all the time. So much in fact that I spent the first couple of months trying to figure out what is wrong with my car?!? I even took my car to a dyno to make sure that I hadn't done something to the engine during installation.
With 3.54 gears and 325/50 drag radials, I can mat the gas pedal and it will spin through first and halfway through second, and that's only if I'm TRYING to make them spin. From a rolling start, I can mash it and it hooks. I guess what I'm trying to say is, that if you run a big tire, you'll have no problem with traction.