What do I need to replace my cracked radiator?

[98sierra4x4]

I am replacing my radiator tomorrow but I'm taking my truck to my uncles heated garage because it's 18 degrees tomorrow lol so I'm wondering what tools I will need? And also how must coolant and other miscellaneous items I may need. And do i need distiled water to mix with my coolant? Thanks

Edit: should I flush the system too?

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