8". /thread
honestly though, how does asking people on the internet who you've most likely never met, help you decide what YOU will be most comfortable with? thats like me asking "hey guys, you have no idea how much i weigh or how tall i am, but what size underwear should i be wearing???"
your best bet will be to find a friend who has a 330 and one who has a 350 and sit in their car or drive it, and see how it feels. 350 is pretty close to stock in an s-chassis (iirc stock is 360)