Thats funny you asked. About 10 years ago, I built a 68 V100, with a nasty sb, 833 4spd, 8 1/4 posi with richmond 4:10s, and 295/60 tires that hooked. It lasted the duration. Of course there not a 8.75 but I think there under estimated. 8 1/4 are easier to find, cheaper, and have common bolt pattern. All a plus to me, for a sreet beater. Hollis