Is it a C6 Z06..??
If so.. You have a long ways to go.. You will definately need around 500 at the wheels to hang with him even from a roll.. They trap about 128.. The best I have trapped on my setup is 122, so he pulls me over about 110-120mph...
I'm looking to trap over 130mph on stock internals.. Basically you should probably just go with something in the T04R(67mm+) turbo field.. There are plenty of turbos that will do your power level that are smaller, but at that level, I would want something that will make the power with as little boost as possible. Focus on VE enhancing modifications(well designed intake and exhaust components/camshafts). A ROM tune would probably cut it if you were specific on the components you use and/or had the tuner tune it on the dyno.. I pesonally plan on switching over to AEM or similar, but thats up to you.. Spend a lot on monitoring devices if you don't go AEM EMS.. Now if I was just getting into my car, I would go PLX M-500 and Nissan Datascan..
I recommend getting your car up and running first on the setup. Run a conservative 7psi, tune for it, and dyno. On that setup, say good exhaust manifold and cams, if you can't make over 270whp, you need practice and/or have problems.. I feel it is best that every KA novice starts on a run-in KA block that is in good condition.. If you can't make at least 350whp on a stock block, you proably don't need to go pushing on a built block because it will just put you in the hole...
If you just want 400whp check out my setup... It was about 5-6k to get here..
http://www.ka-t.org/cory.php