All good advice above.
The only thing I would add is make sure you have the proper screwdrivers. It's very easy to bugger up a screw head with an ill-fitting driver. :)
Welcome to the forum!
Check post #4 in this link. To my knowledge, it should be accurate. :D
http://rugerforum.net/ruger-single-action/130687-new-blackhawk-s-frame.html