There is a set of rear disc hardware off an 87 GTA on ebay. Every thing from the housing flange out. Will this bolt on a 91 drum housing? I know there is more work to a converson than that, but just curious if the parts change out. Thanks

 

Rotors won't fit your axles. Outer diameter is too large.

 

Kinda what I thought.
If you had a complete disc rear, and didn't want to change the whole thing out, can all the parts, including axles be swapped out to a drum rear?

 

The axle flanges are entirely different.

 

I new it to good to work that easy. Thanks for the help.

 

in case you guys didnt know , the later rotors that came with the PBR calipers, will fit over drum brake axles. just the 87 and older J65 axles have the smaller diameter.

 

People have modified their drum housings to accomodate disc backing plates, but for the lackluster performance, and severe reliablity issues the earlier style rear disc brakes are notorious for, personally, I'd stick w/ the drums. If you can find some of the later aluminum PBR brake setups, then your looking at a decent upgrade.

 

Does anybody know what years the PBR Parts came on? Oh ya, and what does PBR stand for!