I've been converting all my Mopar front drum brakes to disc since the mid 70s! The first one was a few days after I tried to stop my first 70 Road Runner with 11" drums from 100 mph. The only exception was that 65 Barracuda, those 10" drums on all 4 wheels stopped that little V8 4 speed car pretty well, and disc brakes were non-existent for it at the time. Gene