Get a premuffler and a Dynomax or Magnaflow 1-in 1-out universal muffler. It requires some custom bracketry to mount the muffler but it's not terribly difficult.
Edit......... just looked at Tim's video and that's the type of setup i'm talking about. The second outlet adds some more volume and can sometimes drone. But it's the same thing i'm talking about. I'm guessing Tim's muffler is a universal 1-in 2-out crossflow muffler that was used on 3rd generation and 4th generation Camaros & Firebirds (1982 to 2002)
Here's what a 1-in 1-out muffler sounds like running full throttle on the track. Sounds pretty good IMO and just cruising around at lower rpms it sounds throaty/sporty w/out being obnoxious
https://www.youtube.com/watch?v=-1X2b9Ahx9A