[jwd]

Connect it to manifold vacuum. Ported vacuum was used by the factory for pollution control purposes. Anyone who says otherwise doesn't know what they're talking about. With it connected to manifold vacuum, you'll get lots of timing at idle and cruise conditions. The further you open the throttle, the more the vacuum advance drops out and at WOT you have no vacuum advance at all. That's exactly how your engine wants and needs it.

Jim