Muscel car television on Spike did a special and they had the 427 rated at 11.99 for the quarter. It is on you tube under AC cobra. Sorry I cant post the link. Here are couple that come to mind.
For the coupe
Shelby Cobra Daytona 427 Super Coupe - Supercars.net
for the roadster
Cobra Specifications on thecarsource.com
I dont know where you would find the braking information. Good luck.