Well.....this is embarassing. I tried to make a couple of videos with the different timing, but when I dropped the timing from 20-38 to 16-36, it still sounded the same. I have no idea why. It was a drastic difference last time.
Now it could be I don't have the timing quite as far back as it should be as my mech advance springs are working at idle and changing the timing affects idle speed, etc...so maybe it's not in the same place....or maybe it's a mechanical problem that's getting worse since my last test.
But as I made the videos, I thought i better post them. The engine doesn't sound good at all in the audio....i.e. different than when you're there. However you can still hear the exhaust as a seperate sound from the engine sound. The exhaust note is just muffled due to the recording process with a digital camera, so it doesn't sound like the "bark" I have been referring to.
The idea was to hear the engine at light acceleratin from idle to 3000 rpm. I didn't do very well.
Guess I'll just have to do some more trial runs.