Originally Posted by Scarebird
this is a bad idea from several angles:
1. 1979 Seville rotors are 5 on 5 bolt pattern for starters. And they are 11-3/8" in diameter. Your 81 Monte rotors are 10-1/2", so you will easily lockup the rears due to grooss bias mismatch.
What about rear wheel proportioning valves? I thought that was their purpose.