Stephen, If you don't want to go the 'seatbelt in in seat route' you can install anchors in your '65. You need to weld the anchors onto the roof. Remover the headliner and you'll see the two 'frame rails' that are used. You can get anchors from seat beat vendors. I got seat belts from Andover Auto ( _http://www.andoauto.com/_ (http://www.andoauto.com/) ). Ned