the cam that was in the motor was from when I had a carb intake, it pulled to 7200 easy, but then when I put the stock Fuel Injection on ...the motor would only pull to around 6200, so....looking at cams the stock Z06 cam was a good FI cam and has a power range of 2500-6200....perfect for the stock intake. Now I think the heads/intake could use more.....but Ill try a throttle body first.