That car looks really familiar!!! Looks like you are having fun with my old Cobra!!!! 490 RWHP isn't bad for an upper only ported eaton car. Was it really hot during the dyno run? If you ever decide to throw a lower on there you will gain a very good amount of TQ all over the powerband. 500/500 will be very easy.
I eventually found my Z06. I picked up a 2007 silver one with 7300 miles on it.
Thanks guys!! And Chong yes im having fun with her, put some Mac 3' cat back on and getting ready for some IRS & suspension stuff next. Maybe a lower or some N20! Will see!! Shoot me some pic's of your Z06....