741 Cone Type - looking for tear-down/build up info

Before anyone mentions they'd chuck a 741/2 and go 489, I'm operating on a budget and am looking for specific info from folks in the know about these cone stye SGs.

I got a book DVD set on HP Differentials which is a decent reference, however, on the cone type diffs it states: "Borg-Warner originally manufactured the cone type from 1969 to 1974. The cone type cannot be rebuilt; your best option is to purchase an aftermarket unit if yours is not working correctly."

So the point I'm at now is I just picked up the complete drum to drum from a 72, springs included. Before I move forward with anything other than the tear-down I've done so far - removed springs, axles & Chunk - I want to tear-down the SG posi and inspect. Since there isn't anything of help in the manual/DVD for the cone type I know there are folks that have machined the cones and shimmed the gears with good success out there.

I'm asking if someone can provide some specific info as to what to look for during SG tear-down as far as: where and what the heck are the cones - I can't find any pictures anywhere that specifically point to the "cones" so I know what the heck I'm looking at, is there a torque that it diff should slip at when one axle side is secured and you're torquing the other axle so you can judge whether the cones need to be machined, and measurements of the cones prior to machining?

Other than that missing info I should be good with everything else.

Thanks