I personally think brakes should be pretty much free in these classes, as it's a safety issue, not a performance enhancing one. At least identify the best brake available in that era, and allow every bike to run it. The vintage sportscar / touring car classes , brakes are free to upgrade to any disk you like just, again for the safety issue. And I think pebble beach concourse restoration type shows don't deduct points for upgraded braking systems.