These are turbo Vg33 dyno charts. They were swapped into 300zx's

http://www.redz31.com/turbofaq/dynographs/dannymuir.jpg

http://www.redz31.com/turbofaq/dynographs/graffzdyno.jpg

I for one think you should go for it. I dont understand why everyone freaks out when you want to increase the power of the 04- X, while at the same time everyone is thrilled at the power of the 05+ X.