I've got an 833 behind my 5.7 right now. I'm still running a mechanical clutch without too much issue, but I think my setup is screwed up to start with. I don't think I have an A body ball pivot bracket on the bellhousing because the Z bar doesn't sit very straight and I had to modify one leg of it, but I'm pretty sure it wasn't an A body Z bar either. Long story short you can do it. I've been thinking about just making my own Z bar, it's really just a tube with some flat bar welded to it.