Hi,
I might offer a few words of advice if I might,...
1) Use C2 cams for track use. They will still pass CA smog, too.
2) Leave the ports alone. They support well over 325 HP in stock form and its VERY easy to ruin them with well-intentioned but misplaced changes.
3) Make sure you plumb your muffler system correctly. Attaching the mufflers directly to the collector flanges makes more noise than power. I won't tell you precisely what to do, but I'd kindly suggest you study the race muffler system pictured on our website for cues about what works best.
Your engine should run very well, especially if you install good close-ratio gears.