My Sonoma has a 3.08 8.5" (code G80) gear with the poop Eaton Gov-Lok diff. I need to change to a 3.42 using Richmond gears and change to an Auburn diff. Will a 8.5 Auburn unit fit in my housing? Where can I find a code for number of axle splines? If I have to pull the axles, thats no big deal though. Sorry for the book.