My buddy had a 64 Fairlane street car with a full cage, it was very difficult to reinstall many of the interior pieces.
The Fairlane Club of America has extensive on-line tech articles and I'm sure the headliner bows arrangement is mentioned in one article. You have to be a member to see the info, but its only $35 a year. One of the few car clubs not ruined by politics like the Shelby and Mustang clubs.