'68 -'74 Nova (X-bodies, actually). Get the diff before you get custom wheels so you get the right backspacing. I think '72 was the first year for the 8.5, earlier was 8.2. I haven't confirmed it yet but I've heard that the mid '90's Caprice taxis had the 8.5 diff with a 3.42 posi as standard. The unconfirmed part is whether the center section interchanges with the older 8.5's, 'cause I have confirmed the existence of that diff at the local boneyard. Anyone try that yet?
