First think was to install a new powered antenna. The original antenna worked, but was badly pitted from age and would cause wind resistance when I wasn't actually listening to FM. The new antenna went in fairly well, with a reinforcement bracket rivnutted into the fender and sprayed with undercoating, but the angle of the fender is just slightly off the closest adapter so there's a small gap that will always bother me.
Next I wired up the radio's connector to switched and unswitched power, the antenna, the dashboard light circuit and the two front speakers. I was amazed that it powered up the first time and made the antenna go up and down correctly. I then spent about an hour getting the radio to talk with the phone over Bluetooth, synchronizing my phone book and the rest. It will take me a while to fully explore everything they can do together.
Here's a shot of the radio installed in the dashboard, playing some music. It even comes with a hand-held remote control, so I don't have to lean across and try to fumble with the tiny controls.