I need some insite on how hard I can push the stock bottom end in my 06 GT. I've got a Whipple that has been on 8 lbs for almost two years with no issues. My internals are 100% stock. I just went to a 9lb pulley and the car made 461/426 with a somewhat conservative A/F ratio and timing but I'm nervous about running it at the track. Any thoughts? Anybody making more power with no issues? Anybody popped a motor at this hp?