Must have been a '69 thing because I parted a rough '69 300 convertible several years ago and it had that strap on the driver's side mount only. I saved it and plan on using it on either my current convertible or my '68 300 someday.

I have another friend in central Mass. that took one from a parted '69 C body and is currently using it on his '70 6 BBL. 'Cuda. Works like a charm and protects the fan shroud and shaker hood stuff. THey should have used it on all BB cars of that era.