Trick Flow 440 heads, The Real Deal?

440outlawdart said
.........what would be the advantage to belt drive over gear and chain drives?

I was always under the impression that the belt drive reduced unwanted harmonics in the valvetrain.

Also a chain, no matter how perfect, could still have some microscopic slop and not be as accurate.

This could affect the integrity of the ignition timing and cause spark scatter......Wrong?