Well like was said already, you need a ported vacuum source. But if I were you I would try hooking it up to a full-time vacuum source. Only difference between ported and full vacuum is the ported vacuum will give no vacuum at idle and less vacuum at lower throttle levels. If you hook it up to full vacuum, at worst you'll get a high idle speed and it may want to ping or stumble at tip-in. But with your base timing set at only 9*, I would give it a try.