I have a pair of factory shoulder belts to install in my 67 442 and am wondering if anyone knows exactly where the factory anchor holes are behind the headliner. I do not want to remove the headliner as it is original and perfect. I can't find a measurement to go by, does anyone have shoulder belts in their 67 or know what the measurement is.

 

Have you tried feeling around for them? The headliner can't be too terribly thick, I would think you could feel the hole for the bolt.

 

I had this to deal with after I installed a new headliner on my '72.( although I had the advantage of seeing where the holes were before the install) If a '67 is anything like later years, you can feel through the headliner using your fingertips for a raised boss with a dimple-like depression. When you find the two close together, measure the distance between them and then verify with your mounting bracket. Nothing worse than punchimg an unwanted hole in a nice headliner. Chumley

 

I know in the '70-'72 service manual, or assembly manual?? it shows an illustration of where they are. I would be the '67 manual might also?
Good luck.

 

Due to a photo that "Oldsmobility" posted of a roof without headliner I was able to find my mounting holes for the shoulder belts. There is a raised pad right in front of the coat hook with three holes in it. The front and rear holes are for the seat belts. I pushed hard with my finger and found the holes, I then pushed a scribe through the hole and then pushed the bolt through the hole and mounted the shoulder belts in the threaded holes. I feel so much safer now when driving. The 68's built before Jan 1, 68 without belts will also have the same threaded mounting pads