Unless they change the grill for 75-76 300Ds, or mine isnt stock,the one on the left isnt of that vintage. The grates on mine are angled slightly, and are cast aluminum. The ones on that look to be steel, but i cant tell for sure

~Nate

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95 Honda Shadow ACE 1100.
1999 Plymouth Neon Expresso. 2.4 swap, 10.5 to 1 comp, big cams. Autocross time attack vehicle!
2012 Escape, 'hunter" (5 sp 4cyl)