http://www.practicalmachinist.com/vb/south-bend-lathes/
There are a lot of SB owners here and a wealth of info.
Also links to parts and lube plus a great book to get you through take down in case to need to clean or repair.
If you already know of this web-site, disregard.
I grew up with one. I have my fathers 1946 9-A 56" bed and his atlas mill.
I got it when I lost him - the lathe is great but I sure miss him. Using it is a way to be near him when ever I turn it on, which is a few times a week.
If you are a gun crank a lathe and mill are invaluable, but you already know that.