Anyone run this Voodoo cam ?

Ken said advancing it would make things worse if it is scam issue.

This motor is a typical 5.9 with Airgap and Doug's headers.
I have tried multiple timing curves .
But the under 2k remains dirty. Certain combos of carb tuning and timing are better than others but it's still not clean down low.

It's almost as if 1 cylinder is misfiring... But it idles nicely around 750 RPM ... Bizarre