Service Manual supplement is at:
http://chevy.oldcarmanualproject.com/shop/1959trucksup/59ctsms0506.htmlI'm hopping the clutch packs are the same as a 44 powr loc.
I've got one to open up and compare.
One thing to think about that I learned the hard way.
Some powr loc's have reverse threaded bolts on the carrier halfs, some don't. The reverse threaded ones are expensive if you can find them.