The rubber top fits nicely; but it appears there is an extra stud in the center with no hole to go through. What am I missing here ? Should the stud be capped ?
@Mikey914

There is a small bracket on 74 and earlier cars to support the rubber top in the center.

I thought so. What do you suggest I do ?

If this is a back date effort you wont have the little support tab on your chassis.
You can fab one & weld or screw it in place or let it (the top) float.

Yes it’s a backdate. It was mentioned earlier that the top has a contious internal metal support, so a backdated bumper won’t need a support.
I’ll slide aplastic thread protector on it. While test fitting, it doesn’t show much

Well ..they all had/have a continuous internal metal support, what changed IIRC was the material (from mild steel to stainless). The reason for the Tab/support was that the void in the bumper center that provided for the plate mount & lights, allowed for the top section to deflect if for instance someone leaned on it while storing items in the trunk

+1 it is so thin there and helps with alignment. Epoxy on a mount...

The license plate lights mounting screws penetrate that steel reinf in the bumper top. One of the two screws for each light is a ground screw. That tab on the 70-74 chassis provides grounding for the lights. If the lights are not hooked up correctly you’ll blow fuses due to a direct short of the lights power circuit to ground.

Aha ! My new bumper top has one hole near the end of each license plate nook; however, the new Uro license plate lights mounting holes don't line up with that hole.

My bolt is a little long. I was going to cut it off but thought I might want to attach something there. Haven’t figured out what yet. It only been about ten years.

You're finally doing it eh Jim? It's gonna look great!!!