I have about a 600hp 470". I SMOKED a 10.5" B&B. Wasted an 11" scalloped. Then I installed a McLeod twin disc. No more problems. It IS kinda touchy and a firm pedal. Tough to granny drive and slip the clutch - it basically is engaged or disengaged but still very streetable. You have to be thinking about your clutch engagement. Couple times at a light I got distracted, engaged the clutch a little too aggressively and LEAPED through the intersection - great 60ft time