cc306 has way too much overlap. Like canbaufo said, you need a cam with 114+ lobe separation angle. As you can see in my sig, I had mine ground on a 115 lsa. Also, supercharger cams generally have about 10-12 degrees more exhaust duration than intake. Lastly, I think that alcohol injection would suit your needs better than nitrous... I am using alcohol injection on my car. Granted it's only 6 psi it's works very well using no intercooler. I believe RSKrause is only using alcohol as well and his car is well into the 600 rwhp range.