Can you install the center hump right now or at least set it into place? If yes, you should be able to just align the left upper shoulder harness nut sleeve with the bulkhead grommet hole. Then you can get a true to your car measurement. Again I will build you a bulkhead to fit. Could send a complete kit, you pull the new bulkhead and put yours back into the box and hope we can find a customer out west---might be a possible plan.