My 1964 Dart hardtop had front lap-only seat belts WITH reinforcement plates. As per the original post, I located the marks in the rear floor then fabricated my own replica plates as per the front and welded them in. The only variation was to fit a pair of shoulder mounts under the rear parcel tray because with a young child they have to travel in lap/sash seat belts (Australia). It all looks 100% factory and passed registration inspection first go!
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