A loud V6 still sounds gross IMO (GNs excluded). If it runs okay I'd just focus generally maintaining it. There is really nothing to be gained by throwing money at the 3.8 for any noticeable performance gains. If it runs well you might be better served to just work on the cosmetics of the car. Almost anyone who has been into Gs for awhile will tell you not to waste any time or money on a V6. I know any V8 swap seems expensive and time consuming but it's far better in the end. Also keep in mind that once you upgrade the engine you'll need to upgrade the transmission, then the rearend, then the brakes, then the suspension, and on , and on... My advice is to keep it mechanically stock-ish for now and put some miles on it. That will give you time to decide what/how you really need to change.