I purchahed the 8.75 "internals kit" and bolt kit through Doctor Diff (thank you!!!) and the clutch pack was a NOS Spicer pack a friend had on the shelf from years ago. The steels were identical from what I could tell but I did not put a caliper on them.
I can try the suggested above... with that said, nothing was dry during the install, everything inside the Power-Loc was well lubricated. I made certain the Ford LS addative was covering everything inside.