hello, i would do a cam swap, i got an ls6 cam and i have never done a swap before, i just tore into the motor and the guys on the site have been more than helpful, they will get you through the tough times. also i got a spectre intake for 105 bucks and had a guy weld up a flowmaster for 150. it made a good difference. i can send you the site for the intake it was the cheapest i could find. goodluck and welcome to the site.