Need help changing rear hub..

[THe Dude]

I couldn't decide if this should be in the drive train section, suspension, or wheels & brakes. Anyway, I'm going to swap the entire rear driver's side hub on a 91 legacy AWD turbo. I need to pick up a few tools and other things at Autozone later and I want to make sure I do this job correctly. What tools do I need? Does anyone have step by step instructions on how to do this? How about torque specifications? Any info will be helpful. Thank you.