Ok, i went from a 10 bolt, drum, worn posi to my 9 bolt, 3.45, working posi disc. Well i have just a few problems....first the e-brake does not work too good...it works some but with the car in drive it still can turn the wheels up in the air, the rear brakes(hydralic) do not work that good either, but i still have the drum PV in there. I am gonna switch that out and get that GM recall caliper rebuild kit for them, then have STS bleed the breaks. Also I need pictutes of how the sway bar mounts up on a 9 bolt....it is different then the 10 bolt.

I swapped the rear sway bar (and rear end) from a 87 GTA with a 9-bolt disc into a 82 Z28
(originally a 10-bolt w/drums) without any problems at all. It does appear to hang down slightly more than before at the pumpkin, but not much.

ummm, the only problem is that mine was rigged.....i am gonna go see where i can get the mounting hardware for the 9 bolt, ne one have ne other ideas besides the GM dealer.