I have an 8.5" ring gear, 28 spline gm corporate 10 bolt rear end. I (unfortunately) have the g-80 "locking differential" option (limited slip) This thing seems to have a special carrier, (cutaways and holes for the governor set) I know it's the factory diff cause it's on the window sticker. I would really like to stick one of the detroit or easy-locker offerings in here, but they don't seem to have a clue what I'm talking about. I know some of you have discovered one of these on your K-5 and probably replaced them. Any suggestions? This is an '85 K-5 with nasty ol' 3.08 gears, I will be replacing those too.............390s? "who dares wins"