1974 duster starting issue

Also noticed that the radio doesn’t come on when key is in accessory/run position. When car is running the radio keeps turning on and off. Don’t know if that has anything to do with it not cranking.
Radio circuit on '73 and '74 are similar. A lot more than just radio.
See this for an example.
https://www.forabodiesonly.com/mopa...t-working-blowing-fuse.508597/post-1973745774