65 Dart wiring push start
Gazillions of info on the web. The starter circuit in my 1996 Plymouth is the same, other than they use a standard Bosch relay (in underhood fuse/relay box), instead of the custom starter relay on your firewall. A common problem is the neutral safety switch which grounds coil- when in P or N (or clutch pedal in). Usually the switch is fine and doing its job since the transmission isn't actually in P or D, despite what the cabin indicator shows, due to slop in the linkage, as 67Dart273 suggested.