Rear shoulder belts?

I welded a reinforced bar to mine and used the stock sebring convertible mounts and placement the open areas got filled up with 3"L ,1/4" thick angle and a beam 2.25" x48" underneath the crossbar was 1/4" plate steel bolted and welded together for support, the weak point is not the wheel tubs but they are getting a "bucket seat stiffener approach after I test things out.
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