The GT500 is better than the Cobra’s in some ways and worse in others. The motor is larger and with more displacement comes more power. At 8 psi I’ve seen stock ones put down as much as pullied and tuned 03 cobras with 15psi of boost on a stock blower. With mods like more boost the power goes up from there!
Here’s a stock GT500 vs on with pulley, intake, long tube headers, and tune:
Here’s a stock GT500 vs on with pulley, intake, long tube headers, and tune: