are the brakes the same on all fb's excluding gsl-se models. please any and all info will help. i have an 81 base model with rear drum, will 85 gsl front brake rotors interchange with mine. also when i put in my 81 gsl rearend...disk brakes and lsd will they be interchangable with 85 gsl rear brake rotors. Thanks

 

All the 84-85 cars had bigger front wheel bearings,so the rotors are different.Rotor diameter and width are the same,but they wont bolt up to the older style spindles due to the bearing changes.
All the GSL rear brakes are the same.
79's had different front calipers(wedge type)
Early models also had different pitch brake line threads.

 

thanks