I have read that 3 point seat belts became available late in '66. Since my headliner is in, but not finished, I was poking up around underneath it just above the door. I felt some extra metal there right near where the front and rear windows meet. Is this the place where the 3 point brackets can be mounted? I really want 3 point belts and I don't care for any of the aftermarket set ups I have seen. Anybody out there with a '66 or '67 with factory 3 point belts have any pix? Thanks.