68 Nova master cyl w/disc brakes
 

Does anybody have a listing of the 2 digit code they stamp on the flat pad of the master cyl? I have a 68 nova with disc brakes . The number stamped in the housing is a 5460346.
I found one with a ZA stamped in the flat area and it shows to be a 68 camaro. Not sure if it was used on the nova or not or if it has a different 2 letter code. Not sure if the GM parts book will show that info?

Master Cylinder 1968...
 

Pretty sure Nova and Camaro were the same...this chart from the Camaros.org site may help.

http://camaros.org/suspen.shtml#Brakecomp

Thanks Wilma