I have a 1965 M20C equipped with a Brittain autopilot with heading, cap, track, and loc selection knob.
At this time the auto-leveler does not work but I plan to fix it. I am upgrading my aircraft with a GTN650, GMA350, and a course indicator GI106A. The GI106A comes with a VOR/ILS or VOR/ILS with course datum for an extra $500. Does anyone known if a Brittain autopilot can interact with a GTN650 and a course datum to intercept a course?