Originally Posted by The Chevyman
I have a 57 Coupe with a factory Camaro disc brake rear end I have no idea which model its from and I wish to replace the calipers. Can anybody tell me which models had the rear discs or how to identify this rear end?
If it's from a 2nd gen F-body (Firebird/T/A) it will be a 8.5" rear end. If it's from a 3rd gen F-body it'll be the 7.5/7.625" rear end.
The difference can be seen externally- take a look here
for more info on ID'ing it.