Modifying 68 barracuda hood mount signal housings

Been working in my head about the idea about cutting the visible screw end off. The center stud that holds the lightbulbs steel grounding plate inside the housing could be drilled and tapped for a 6-32 screw, and built up with JB weld around it to strengthen the stud a bit. Would have to sand blast the primer off on the inside to do this to get a good bite. That would be the second internal mounting hole as well as a ground. I would need to drill and tap that anyways for reassembly. If i dont use it as a mounting point i was going to tap it as a smaller 4-40 thread, and use button head allen screws to hold it together. These sit pretty flat against the hood, so it wouldent take much torque with a nut driver to secure them tightly and get a ground if i went with the hidden fastener route.

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