Do NOT buy a cheap water pump. My NAPA pump is over 10 years old, close to 100,000 miles, thru a lot of drag racing abuse back in the day, too....
X3 on all this: Buy the Lisle flywheel tool. A cheap HF 3/4" breaker bar will be needed, too. You'll also need to borrow a torque wrench that'll go up to about 275 ft/lbs.