It wasn't me, but my friend's older brother. He had a, I think '79, Buick Grand National that he bought as a roller (perfect body and interior sans turbo 6). He put a Pontiac 400 in it. We are all excited because he let us middle schoolers go cruising with him that night. So he gets to one of the turnaround spots and decides to show out and lay a patch. What happens? He annihilates the 10 bolt rear end. So the car revs up, lays two feet of rubber and has to get towed home. It was like watching Ralphie shoot his Red Rider for the first time and almost shoot his eye out.