Ring and pinion help needed
 

So thanks to Pukie370, I now have 3.55 gears to replace my 4.10's. They do not have the bearings or shims so I'll just ask our wonderful sponsors for help with that. What I need your help with is how to know where to set the pinion gear depth at. There is a factory number but I don't know what it is and the manual doesn't have anything like that in it. So there you go, any advice as well is greatly appreciated. Dana 60 and Dana 70