Are the bolts covered in their favorite dry blue Loctite? We had to scrub it off with a wire brush and use anti-sieze to keep them from welding themselves to the aluminum calipers during track use. The excess Loctite was contributing to stripping out the calipers after several rotor swaps. Once I removed it and switched to the anti-seize I didn't have any more issues. It would have been nice if they used a threaded steel insert to help with that, but I'm assuming the OEM units are all aluminum again? I haven't pulled mine to check yet.
Of course it's possible, but you might need to swap out the master cylinder and of course you will need a different bracket for mounting the calipers. I assume the larger GT350 calipers will need a larger volume of fluid to actuate them. I would also be a little concerned about the ABS system from the GT functioning properly. I suppose you could choose to delete the ABS system, which might require some programming knowledge.
Ford lists them as one time use. I assume it's due to the Loctite and for liability reasons. If you use a new bolt with preapplied Loctite and torque to specs, it's not coming loose. If you're going to track the car and swap rotors frequently (and regularly checking torque on them and suspension bolts) you don't need to replace them every time. I generally used new bolts on every other rotor swap.
I haven't looked close, but wouldn't the new ones be red?
Shoot! I haven't looked at these Brembo's that close... I thought we had the ones with pins to remove the pads. My other car has an older set of Brembo's that do show the two bolts, but those don't need to come off for pad changes.They're on the inside of the wheel (i.e. facing the engine). Who cares?
Even if the head of the bolt was painted red, it probably wouldn't be for long considering you have to torque them on and off for every pad change.
I wouldn't sweat it. You'll be fine reusing them.
