General Maintenance & Repairs - water pump removal, anything i need?

I have to remove the water pump to install the heater hose fittings. Do I need anything from the auto store in order to install it back ? I'm 100% new to ls1. Just had a shop install it in my 80 vette, they did a horrible job so I'm redoing/fixing all the problems.

Nothing special. I would replace the gaskets or at least have a spare set handy. The metal o ring type are reusable within reasonable age/condition.