Will my headers crack in winter?

I have a 1993 Dodge Dakota. It's a 2 wheel drive sport, so it's a short box single cab. Street truck. Anyways, it has a 318 Magnum with shorty headers. It also has a beefed up posi rear end. I was wondering how anybody thinks it will get around in the snow? I'm from Wisconsin. Also, will my headers crack themselves or my engine block? Because of how hot they get and the cold air? I'm just kind of nervous about them for this winter.