I'm familiar with Adams work. He does very good work. His 3100 v6 sounds perfect.

That stock downpipe is pretty small. Not 100% sure what I want to do exhaust wise. I've been tending to lean towards some flowmasters.

Cammed Pontiac GT - YouTube

That was my exhaust before the engine rebuild. Something was clearly wrong. I haven't heard the car run since the engine rebuild. I'm hoping it doesn't sound like that.