Just wanted to add that I, as many others, tried to remove the water pump by conventional method, but broke off both places where bolts were inserted, big channellocks didn't help either, then, after spraying the pump with WD-40 equivalent from Seafoam (Deep Creep) I've used crowbar method shown there:
https://youtu.be/BTs5ZN0fTrk but putting some wood between crowbar and block.
Worked as a charm.