1974 Duster not starting.

1. check to see if the neutral safety is causing it buy holding the key in the start position and move the shifter through the gears. (keep your foot on the brake during this)
2. You mentioned it cranks with the relay, but does it start with the relay jumpering?
3. I there power at the coil pos side (test lamp)

Lets start with this and go from there.