[xb-60]

My information is that the 'standard' front brakes aren't GM brakes as such. They are manufactured in Australia by PBR and fitted to the higher performance Holden Commodores (and Ford Falcons) in Australia, and GM apparently regarded them to be good enough to import and fit to Corvettes. So, they aren't Corvette brakes, they are PBR brakes that are fitted to Corvettes. And , I believe, similar ones were fitted to Ford Mustang Cobras. All of these cars are significantly heavier than an ERA Cobra.
Also...I agree with Grubby's sentiment about how long brakes take to heat up. If a particular caliper is designed for extreme conditions (ie high speed, racing etc) on a heavy car, then it will take longer to heat up to operating temp on a lightweight car like a Cobra.
Cheers,
Glen

edit: nobody's picked me up on this yet....ideally the rotors heat up, not so much the calipers!