I have a 69 Dart Convertible and wanted modern shoulder harness seat belts. Since there is no convenient place to mount the shoulder harness, I retrofitted a pair of 2003 Cadillac CTS power seats with integral seat belts. I'm sure there are several ways to do this, but I sided on over engineering it to provide as much safety margin as I could while retaining a clean assembly. In addition, I've included information on how to integrate the power seat controls without having to add the extra control electronics that came with the donor car.
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