Just a point....the mid-80's Camaro/Firebird differential is 62" wide from wheel mounting plate to wheel mounting plate....within a 1/4" of the stock AD differential width.
I'm currently running an 88 Camaro/Firebird 3.42 drum diff and have also run an 89 IROC-Z posi/disc 3.08 on my daily driver 54 truck. When you convert to the 5 lug on 4-3/4" (Camaro/Firebird) bolt pattern you may have to buy aftermarket rims with 3-5/8-4" of backspacing if you go with 15x7 or 15X8" wheels. I scoured the j-yards for just one for a spare tire. This Back spacing will give you tie rod clearance with a 235/70/15's on a 5 lug front disc conversion and 255/70/15's on the rear if you chose to go with 15" rims.
The rear Camaro/Firebird sway bar is also applicable to the AD. Be sure to salvage the emergency brake cables as they can be slightly modified to work with the stock AD footbrake. Also the driveshaft.
Dave
