Dick,try and find an 06 if you can,it was the second year for the LS2,they tweaked it for a about 10 h.p. more than the 05 SSR.
If you are going to go to the next level I highly recommend Vengeance-IMO the best in the biz for LSX cars.
http://www.vengeancerd.com/
Here's my SS with a Vengeance L92,553.9 at the tire on 91 octance and CA emissions legal. It's normally aspirated in case you were wondering
http://s14.photobucket.com/albums/a3...=SSAirport.flv