Water pump.....Remove heat shield/remove power stearing pump to access lower rad hose......sounds like fun, doesn't it....
Leave the water pump alone for now, 140,000 miles on stock water pump and its doing fine. Did the wife's water pump for fun...
Impact gun...yes sir
or
Tranny in gear, friend pushing hard on brake pedal, breaker bar and lots of grunting!
I have used both methods and now only use impact gun.
Do you have your Tension spring and bolt?
