Electric Choke

I know there are some more general discussions on the form with electric choke questions and answers. I am looking for more specific solutions and thoughts from early A owners. I have a '65 Dart with very original wiring so I do not want to hack it up and make it difficult to diagnose later on.
I have a relay and a inline fuse (10 Amps) to use for the choke but I am looking for a good source to trip the relay (and power source) or alternative solutions that have already been done.
I have some ideas and thoughts but there is plenty to learn and a lot of prior experience from other remembers that I do not have.

Thank you