help setting up a 8.5" 12 bolt

I was wondering if any of you guys/girls had any good information on how to properly set up a 8.5" 12 bolt in a 72 chevelle. tools needed, where to get them, and all that good stuff. it has a "GM disc type rear axle case" as a service manual i have found calls it. I have the instalation instructins from richmond where I have purchased my new gears but they are not all that detailed. If anyone could give a wirite up or direct me to a good website that might be able to really talk me thru this procedure that would be great.

Thanks in advance