i have a 9 bolt posi out of an 86 iroc. the car had 120k miles and the car was driven often until the engine went. car has been parted out other then this rear and t-tops. it has 3.27 gears and is complete with all brake components. if upgrading from drum you will need the larger master cylinder for proper pedal. i did not keep this part off the car. i would recommend you pick this up or i may be able to arrange shipping, depends on where you live. my zip is 28104, matthews NC (near charlotte) travrock@rocketmail.com emails will be replied to sooner. thanks for looking (off set cast brakes) id# 10032270