new here and i've got a trick for ya'll
i found a great way to get a seriously strong rear end into your a body with a relatively small investment in time and $$$$.
find a 92-95 Explorer (yes i KNOW its a Ford). they have stout limited slip units and decent gears from the factory and disc brakes. the one i got is a 4:10.
when you find one, pull it out and cut EVERY mount off thing. shock mounts, spring mounts etc...get the mopar perches. once you have that stuff you can easily align everything, but here's the trick! the ford explorer drive shaft is the perfect length for an abody equipped with a sb and a 904. just go to the local driveshaft shop and get a bastard U-joint and you're golden.
now, to hook up the e-brake, use TWO left side cables from a ford explorer. it will hook right into your a-body e-brake with NO modification. now, you have a strong rear end that has plenty of aftermarket support, disc brakes and didn't spend a mint.
sb