yes because the Brembo's from a 2007 GT500 are pretty much the exact same as the ones found on the current Brembo equipped GT's. now if you are talking about the brakes from a Shelby GT then no I wouldn't do it since its no advantage and if you just want better braking performance from your stock setup just upgrade the pads, lines to SS braided, and a higher temp fluid like a DOT 4 or 5.
buy new hoses so you can forget checking those, I'd check the rubber boots around the caliper pistons for signs or cracking and splitting. I would buy new pads and have the rotors resurfaced or if its in the budget get new rotors.
my XP10s dust and squeak like hell, Be ready for that. Have you tried the carbotech 1521 for street use? Thinking about snagging some of those next.
They wont stop any better than your base GT brakes. The only benefit the 14" Brembos offer over the standard GT brakes is more heat retention on a road course, but the clamping force is identical. If you're not running them hard, and don't kid yourself; no amount of "hard" on the street will measure up to a 20-30 minute road course, then they'll offer you no benefit.
I race on my standard GT brakes and i can still kick the ABS on with 295 NT-05s at all 4 corners using the Carbotech XP-10 and Centric premium rotors. This means i still have WAY more brake than i do tire. If the dudes giving them to you then by all means take them, just dont expect a night and day difference. Your pads and tires will matter more than the calipers themselves.
I think you missed my point. The Brembos will certainly retain more heat, mostly due to the larger rotor, but the physical stopping power between the two will be virtually identical.
I'm by no means preaching the superiority of the stock brakes in regards to the Brembos, i'd love to have Brembos, i'm just saying dont expect a night and day differene in stopping power making that switch.
In regards to your comment though, i do have 3" ducts and DOT4 fluid. Typically i find a lot of times on the street the brakes get dragged, as opposed to the more "on/off" nature of a road course, and dragging creates a TON of heat.
OP, I would see if the bleeder screws are not stripped and not corroded. I installed a used set of gt500 brakes on a buddies car and the bleeder screws were stripped and corodded. I had to uninstall them and reinstall his stock brakes.