I can't say, I've never had a 500 hp car. Never mind a turbo'd one,lol.
But I wouldn't give my 3.09 up, no how.
But if I did ever build a turbo'd car, I think with what little I know today; it would be a big enough engine, with a small enough cam,to pull a small enough rear gear, and 3 of them in an automatic would be enough to do whatever I wanted it to do.lol. Or just maybe it would have a gearsplitter and a wide ratio and a little V8,lol