http://forum.jdrace.com/viewforum.ph...c210ee222ddbfb Alot of good info on here about the 8.2s. 68 thru 70 buick had larger carrier bearing on drivers side than on the other side. Be aware some of the pontiacs were fitted with this buick rear instead of the pontiac one. My car was like this when it had the original 8.2 in it with one rib on the side of differential for buick instead of two ribs for pontiac on 8.2.