Those are imressive numbers. John B's Monte Carlo dyno'e 487 RWHP, I am sure he has some tuning tweeks done and a good free flowing intake and exhaust. You can check out his web page here:

http://home.earthlink.net/~bzdel/

He has been working with John Spear at Speartech on the electronics and tune. Are you going to put any sort of rollbar in your roadster? As fast as it will be, you will need that to run at a track. It does kinda take away from the look though. Can't wait to see your progress.

Pat