Just to follow up on my LS3 480 HP install on my 996, the acceleration and performance is "breath taking". I haven't really expanded the RPM's above 5 grand (red line is 7,000) because my transaxle is all new and it's needs breaking in just like the motor.
So far I have no regrets, however I'm still dealing with some electrical issues. I'll get them solved, but it will take some time and money since they're over my pay grade and Renegade doesn't have any schematic, here's how fixes either. I'm sure given enough time they will, but for now they just talk in generalities.