Mark Houlahan
Tech Editor, Mustang Monthly
January 6, 2014

Having a headrest installed greatly reduces the chance of injury.

11. Slide the headrest bracket into place from the top of the seatback frame, ensuring it’s positioned per the instructions, and align it with the existing holes in the seatback frame. Install the Allen-head hardware through the seatback frame and through the headrest bracket, and tighten by hand until snug. This will seat the square nut to the bracket. Finish tightening the Allen-head bolts with a 3⁄16-inch Allen-head socket.
12. Once the headrest bracket is secured, the seatback material can be carefully repositioned and pulled tight to be secured by new hog rings.
13. Using a pick tool or awl from the underside of the headrest bracket carefully pass the tip of the tool through the bracket’s mounting holes for the plastic post sleeves until you pierce the upholstery. This will act as a centering point for the cuts you need to make to the material.
14. Using your razor blade or hobby knife once again, carefully cut an X pattern over the centering hole made by the pick tool or awl. Cutting away some of the foam directly under the opening will help with installing the headrest post sleeves, or you can remove the required foam over the bracket before reinstalling the upholstery.
15. After performing the necessary trimming/cutting for the headrest post sleeves, the sleeves can be pressed through the upholstery and foam and into the mounting bracket. Use a flashlight and guide the sleeves through the bracket as needed. Note the headrest post sleeve with the release tab needs to be mounted with the release to the right (passenger side) to engage the headrest post notches.
16. When inserting the headrests into the guide sleeves, double check that the guide posts have no interference with the seat springs through their course of movement. We had to bend the offending spring loop shown here downward to allow the guide post room for movement without catching on the spring. When you’ve verified the headrest moves freely you can reinstall the seatback rear panel
17. Fully seated to the top of the seatback, the vinyl used by TMI is an exact match for the existing upholstery and looks period to the car/seat and not a tacky add-on. Repeat the installation steps for the remaining seatback and you’ll be ready to reinstall the updated seatbacks.
18. Back in the ’66, you can see the new headrests blend right in with the interior and will be a bastion of comfort and safety for the owner and his passenger when taking this coupe for a drive.
19. While it’s surely a matter of preference, we like the look of the TMI Products headrest in the full-forward-tilt position (left). However, with the headrest in the first position (right), it is more parallel with the seatback. Either way, you have four positions to adjust the headrest for comfort/looks.

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