I don't ever remember seeing one on any of my 2nd generation Chargers nor my pervious '69 Road Runner.. Doesn't mean it wasn't taken off at some time........ But, I do agree with you that it seems to be a gravel shield...
Troy Houston Mopar Connection Club '69 Charger Daytona 440 - auto - 4.10 Dana (now with 426 hemi) '69 Charger 500 440 - 4speed - 3.54 Dana '70 Road Runner 383 - 4speed - a/c (now with 440)