Nice find and looks clean! I hope you don't find any hidden issues. I picked up a red t-top king last year and it had MANY covered up hack job "fixes" not visible during inspection. Hoping to have mine on road worthy soon. Good luck with your plans on getting her on the road.
There are several Facebook pages dedicated to the II's as well as one specifically for the Kings. Lot of knowledgeable people to pick their brains. Also MustangII.net is and awesome resource (when it's running)