I have done the swap. I would highly suggest trading in for what you want instead of doing the swap. With that said, i love my car and all but she's cost me wayyy more money to get the same performance as a bolt-on GT. I had my fun as a turbo v6 making 400+ rwhp but it wasn't reliable.
2006 V6 Pony Package Premium -Mods: 61mm Powerhouse Turbo and Intercooler, Evolution Dyno Tune(Jon Lund)
, Steeda Performance Shorty Headers. Current Numbers: 350 rwhp/420 torque @ 8.3 psi (low boost)
415 rwhp/470 torque @12 psi Car died 6/23/09
New Set Up: 4.6 3v With Manual Trans, Bolt Ons