FWIW, I have a 99GT 2V with a Kenne Bell 6 psi blower. It delivers 342 RWHP and 320 RWTQ that comes on about 1500 and stays through 6500. All the accessories work and I drive the car on 1200 mile round trips through the Smokies. It gets 23mpg on the highway with a T45 and a 3.27 gear in the Cobra IRS.
It's an excellent "real world" set up and it cost about $4K. I did it in my garage, but def let Brian Tuner Dude do the tune.