Intermittent Ignition Issue [66 Valiant /6]

jacraest said
The starter relay only has two terminals - both go to the ignition area (one a screw mount, other tang). I have another starter relay that looks like that, do you think the actual issue lies in the starter relay?

Actually I think the crank contacts in the ignition switch is worn out.

Turn on the key and short across those two contacts.
Car should start and run.