If you want to run some figures instead of guessing using this
auto forum search engine the GT and cobra both make roughly 300hp/300tq, with the cobra weighing 100-200lbs less depending on your source [3500 vs 3350]. Different gas levels and driver weights might off set that. The cobra has more aggressive gearing stock and arguably slightly better aerodynamics, but your engine is probably in much better condition and if your tune is good I'd probably give you the edge, mostly a driver's race and should be a good one.