I have a '71 chevelle that has clips on the headliner holding the seat belts up when I'm not using them. My friend has a '72 and his doesn't have those clips but has the sholder belt. I have found some people that will sell me some clips, but do I need any thing that they screw into under the headliner? I have never had to have the headliner redone because it's perfect, so I dont know. Is there some holes behind the liner for the screws? any help would be great. thanks Derek