Here's another half a day worth of work.
I built an entirely new front light harness to convert the 2 headlight to 4 headlight setup. Also had to make the turn signal harnesses longer to get out to the grille area for the different turn signal configuration.
I did have to take a hole saw to the core support to install the power steering cooler. My original core support had the hole of course, but the 4 headlight one didn't. Fortunately, typical of GM, the dimples were there for the big hole and the two bolt holes. It was just a matter of two screw holes and one hole saw hole on the factory marks.
Now if my grille would ever get here....