No, the 64-67 BOP 8.2 is different from the 68-70 Buick 8.2 10 bolt. http://www.jdrace.com/diff_id/10bBOP_Early.htm http://www.jdrace.com/diff_id/10bBOP_Buick.htm
That would be a no. I could make it fit with machine work...but over all not really worth it. You can PM me and I can tell you how. Jim