I've never really shared it in any detail, mostly because I'm a lousy freehand artist and I can't draw it. I'm trying to make some technical drawings of it so i can have a friend who's a 3D modeler make some 3D files for me.
short form is, while I love the 72-4 tail, I've never been a big fan of the sad mouth grille. Aside from the mouth itself, which is an awful shape, the whole thing is way too flat, vis-a-vis something like the 70, that has loads of depth to it. And I think billet, on top of not helping the flatness problem, is mostly an expensive way of not really addressing the problem. Finally, i want something that looks like Mopar MIGHT have used the design, back in the day, something that doesn't seem out of place on a 70s car.
So, I've had all sorts of ideas in mind that I'm trying to come up with ways to see how they look, hence these drawings. While it wasn't really my inspiration, I know i've seen a Mopar grille that was similar to my idea. I wanted to say it was a 71 Fury, but I'm not finding it in an image search.