I dunno, that looks pretty close to the perfect chop for that model of car in my book, whoo hoo.
I'd be proud to wheel that one into a rod trot for sure.
All I can say is stay to the theme you have going
Maybe a set of "Briz" ribbed bumpers. They aren't that cheap but with the cost of buying a decent used set and having them redone the cost evens out.
I'm not sure on the grill mods, I'll have to dwell on that a bit.
A trimmed down 49/50 Merc grill shell might work with a floating grill bar but it would be a lot of work to mold in right. Anything you mold in is going to make the whole front end sheet metal one piece.