Water pump replacement

'93 p/u needs a new water pump. I'm going to try and attempt this myself, barring anything out of the ordinary.

Any tips/suggestions, etc...?

EDIT: I replaced the water pump without difficulty...only question now is how do I purge the air as it says I must with the instructions from the new water pump. Remember...I'm a carpenter, not a mechanic!

With most vehicles I have replaced a water pump on, (or done a flush and fill) I have done what was called "Burping" the coolant system.
This was done at the time of install completion.
It can be messy too... as air bubbles come up and out, some coolant will splash... on the radiator, on the fan (if it kicks on that flings coolant) a little on you..a little on the floor...erc. I think maybe a few ounces..)

Working on a COLD ENGINE, WEARING GOGGLES! we start the vehicle with the radiator cap off [so no pressure builds]. I put the defroster/ <defogger?> on. As it sits there idling, (some have an assistant rev. the engine occasionally, to speed up the process) we add coolant to the radiator... you can see the coolant level drop... continue adding.. the engine is heating up now... you will see steam (smoke) starting to come from the open radiator cap hole... continue to add coolant... the level will rise to the top and air bubble or bubbles beneath it "burp" out...

The coolant gets hot pretty quickly... I have more than once, let a vehicle cool down and perform the burp again... and sometimes more than two times.

I have seen vehicles run after a water pump replacement, some newer vehicles worked the bubbles out via the coolant resivior, others would appear to be over heating... (you stop driving when that happens) then once the engine cools, quite a while..1/2 hour or more.. when you can safely remove the cap... it appears bone dry, add coolant... burp the system there.. on the side of the road.. (not safe of fun) or.. next stop.. somewhere you can safely burp it.
I would be surprised if there isn't some step by step in your haynes manual.
here are links that may be helpful...
http://www.ehow.com/how_7369_burp-cars-cooling.html

http://automotivemileposts.com/garage/v2n15.html