Timing help for '64 Dart, 225 CI

Vacuum- you need to be tapped into a manifold vacuum source. From what I recall you turn the distributor to the highest vacuum reading then back off one in hg and lock the distributor down. If you have no reading at all you may be in a ported vac tap port.
- Timing light- you need to be on the number 1 spark plug wire and also if the mark slid on the harmonic balancer you may be off lining up the marks.

Id use the timing light and a vac guage at the same time to determine whats goin on...