65 Dart wiring push start

Hello y'all

Can someone point me the right direction. 65 Dart with 273 won't start. No crank. Has power. Battery is fine. I jump the starter and it fires up. The dash harness looks worn out. I would like to wire a push start button and call it a day. Can anyone give me the short version as to what what wires to hook it up to?

Thanks