RevXtreme did a D1SC on a 346 ci GTO about 6-8 monhs ago with a cam and headers. It made about 550 rwhp on pump gas and 600 rwhp on pump with alcohol and more tuning. J Formato tuned it. That car is awesome...but surprisingly basic. The owner took it to the track and ran 11.1 at 130 mph...thats right...one hundred and THIRTY MPH. Thats fantastic for a car of that weight.
05 is the 6.0 right? You should be able to equal that hp with a simialr setup without much sweat. Talk the to Revxtreme.com guys. They can do it.
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if it's cheap & reliable, it ain't fast, if it's fast & cheap, it ain't reliable, if it's fast & reliable, it ain't cheap