What should i do?

I need some serious help. Ive been itching to get something faster since i bought my 02 gt. I was considering finding like a 94-98 cobra but i dont know if they would be any faster. i know people wont want to trade a mustang that has some motor stuff done to it for my car which is stock motor. but if anyone would i'd like to know. let me know what you would do.