Grills interchangeable?

[100mph]

Hi... still trying to sort out my build and was hoping someone might confirm what year grills can be interchangeable to others.

I know 67 and 68's are interchangeable but what about 69 thru 72?

There's a nice 'custom 71-72 grill' I was considering for my 69. As far as I can see, fenders, rad support, hood etc are common from 69 thru 72, so why not the grills?

Thanks!!