[twobjshelbys]

Without a roll bar a shoulder harness on the passenger side is discouraged. It's been written about here several times. First, the bar across the back that you attach to isn't really sturdy enough. Second, without a roll bar an an overturning event, the passenger becomes the roll bar. In the event you do attach it to the bar in the trunk it may not be high enough to give proper height to the shoulders and can result in compression spine injuries in the case of a front/rear/side. Shelby would NOT install a shoulder harness in my car and told me if I did that they disclaim it.

Let the battle begin.

For a sub harness it should also be attached to a frame, not just bolted under the seat screws, although a sub harness will likely not have as much stress as the lap/shoulder harnesses do.

Good luck and you really should have had harnesses on the drivers' side long ago.