Winter Storage

I've got water + Water Wetter in my radiator now. I'm done racing, so the car will be going into my unheated garage for the winter.

I usually drain the radiator and fill it with antifreeze & water before storing it. But I will probably need to pull the heads off sometime soon, and it gets messy draining the radiator in the garage.

Can I store it with NOTHING (no water, no antifreeze, etc) in the radiator or block? What would happen if it gets below freezing?