Just put on a set of cobra brakes and bled the system...took it for a test drive, didnt do any panic stops, just normal stops...first thing i noticed is the pedal is firmer. is this because i am still using the gt master cylinder on the cobra front calipers?
Yes, it's because of the GT master cylinder...switching to a Cobra unit will make them a bit softer and will allow you to apply a bit more force to the brakes.