While we're at it, can I hear people's input on differential options to consider, too? My 8.75 has a tight clutch-type Sure-Grip unit and it's held up OK, but I also see options for Eaton/Detroit Lockers, Eaton/Detroit True-Track, the S-Track, etc.

I'm not familiar with the True-Track or S-Track stuff and don't know why you'd run one of those instead of a locker for similar money. Just don't suggest I run a spool, please.