Winter water removal

Thought I’d post on here since this is more racer related. I only used distilled water and water wetter in my car this year. First year of having to get it all out for winter so it doesn’t freeze, what is your experience or what are you doing to drain yours? My car is stored in an insulated building and I think it would be fine but not wanting to take the chance. Drain it and maybe use compressed air somewhere? It’s a 440 based big block.

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