i am using 79 deville mounting brackets also i need to mention that the seville and deville rotors are the same for a number of years therefore can be interchangeable. as i was developing this brake setup there are several possibilities to choose from these are just what i had lying around and scavenged from friends.
here are some of the part numbers that i have that are stamped in the metal are:
1610797 rotors (stamped on back)
1613827 brake mounting bracket (stamped on front)
020 and 021 calipers passenger and drivers
these numbers are gm specific
final note: again this is just what i went with, please research info before spending time and money on your brake setups
good luck
