heres a grill i made for my 76 about almost 2 years ago, it's all stainless and aluminum, and still looks as good as the day i made it.
excuse the crappy pics:
before paint:
i was thinking about maybe making a few and selling them, if there is interest that is. it is for a 280z but will fit 240's too, the thing is it takes a little tinkering to get it to clear the hood when you open it because of the flush look, but it's not difficult to make work.