Installing an American Autowire Classic update wiring harness

I recently purchased this wiring harness for my 1973 Dodge Dart Sport with an MSD ignition and distributor and aftermarket radio. I need to upgrade to a one wire system and I’m leaning towards the 17509 Powermaster Retro. The harness itself is marketed as pretty much plug and play. Is this true? Will I need to purchase any other connectors to make this harness work with my MSD ignition system or anything else? I’m thinking about what to wrap the harness with as well. What do y’all think about DEI or Techflex temp heat shrink? Or any other brand for that matter? Thank you in advance for any suggestions you might have.