It would NOT be impossible to get 180WHP out of this engine. Skunk2 has a Fit making 220WHP 185TQ....stock internals @ 10PSI. I would say anything more than 250WHP you will start running into issues.
Weight is everything in racing, this car is light for a new car. With that kind of power to weight ratio you will have a fast sohc able to keep up if not win. IMO.
Da Fitz