I have 1978 nova 496bb 400 tranny with a 10 bolt 8.5 ring with limited slip. I'm looking to beef up the rear end. To change it to posi would be around 500 bucks. I read a post from another member that a 77-81 z28 rear end would bolt up. Can anyone confirm this or any suggestions on what I could do. The car is currently just a fun toy and I don't drag race... For now that it is. But I want to do it right where it's going to last without spending an arm n some of my leg. Any help/suggestions would be much appreciated.